diff --git a/Server/mods/deathmatch/logic/CAccessControlListRight.cpp b/Server/mods/deathmatch/logic/CAccessControlListRight.cpp
index e6bb72db18..331bd197d1 100644
--- a/Server/mods/deathmatch/logic/CAccessControlListRight.cpp
+++ b/Server/mods/deathmatch/logic/CAccessControlListRight.cpp
@@ -92,6 +92,6 @@ SString CAccessControlListRight::GetAttributeValue(const SString& strAttributeNa
     else
     {
         SString* pResult = MapFind(m_ExtraAttributeMap, strAttributeName);
-        return pResult ? *pResult : "";
+        return pResult ? *pResult : SString{};
     }
 }
diff --git a/Server/mods/deathmatch/logic/CConsoleCommands.cpp b/Server/mods/deathmatch/logic/CConsoleCommands.cpp
index 5f19e566f3..a2da7b28a4 100644
--- a/Server/mods/deathmatch/logic/CConsoleCommands.cpp
+++ b/Server/mods/deathmatch/logic/CConsoleCommands.cpp
@@ -31,7 +31,7 @@ extern CGame* g_pGame;
 static std::string GetAdminNameForLog(CClient* pClient)
 {
     std::string strName = pClient->GetNick();
-    std::string strAccountName = pClient->GetAccount() ? pClient->GetAccount()->GetName() : "no account";
+    std::string strAccountName = pClient->GetAccount() ? pClient->GetAccount()->GetName().c_str() : "no account";
     if (strName == strAccountName)
         return strName;
     return SString("%s(%s)", strName.c_str(), strAccountName.c_str());
@@ -1587,9 +1587,9 @@ bool DoAclRequest(CConsole* pConsole, const char* szArguments, CClient* pClient,
 
     std::vector<SString> parts;
     SStringX(szArguments).Split(" ", parts);
-    const SString& strAction = parts.size() > 0 ? parts[0] : "";
-    const SString& strResourceName = parts.size() > 1 ? parts[1] : "";
-    const SString& strRightName = parts.size() > 2 ? parts[2] : "";
+    const SString& strAction = parts.size() > 0 ? parts[0] : SString{};
+    const SString& strResourceName = parts.size() > 1 ? parts[1] : SString{};
+    const SString& strRightName = parts.size() > 2 ? parts[2] : SString{};
 
     bool bList = strAction == "list";
     bool bAllow = strAction == "allow";
@@ -1608,7 +1608,7 @@ bool DoAclRequest(CConsole* pConsole, const char* szArguments, CClient* pClient,
             pEchoClient->SendConsole("aclrequest: No loaded resources have any requests");
         return true;
     }
-    else if (bList | bAllow | bDeny)
+    else if (bList || bAllow || bDeny)
     {
         CResource* pResource = g_pGame->GetResourceManager()->GetResource(strResourceName);
         if (!pResource)
@@ -1657,8 +1657,8 @@ bool CConsoleCommands::AuthorizeSerial(CConsole* pConsole, const char* szArgumen
 
     std::vector<SString> parts;
     SStringX(szArguments).Split(" ", parts);
-    const SString& strAccountName = parts.size() > 0 ? parts[0] : "";
-    const SString& strAction = parts.size() > 1 ? parts[1] : "";
+    const SString& strAccountName = parts.size() > 0 ? parts[0] : SString{};
+    const SString& strAction = parts.size() > 1 ? parts[1] : SString{};
 
     bool bList = strAction == "list";
     bool bAllow = strAction == "";
diff --git a/Server/mods/deathmatch/logic/CDatabaseManager.cpp b/Server/mods/deathmatch/logic/CDatabaseManager.cpp
index 1ccc1857b2..8fd2da471b 100644
--- a/Server/mods/deathmatch/logic/CDatabaseManager.cpp
+++ b/Server/mods/deathmatch/logic/CDatabaseManager.cpp
@@ -584,8 +584,8 @@ SString CDatabaseManagerImpl::InsertQueryArguments(SConnectionHandle hConnection
         return strQuery;
 
     // Determine connection type
-    SString* pstrType = MapFind(m_ConnectionTypeMap, hConnection);
-    SString  strType = pstrType ? *pstrType : "";
+    std::string* pstrType = MapFind(m_ConnectionTypeMap, hConnection);
+    std::string  strType = pstrType ? *pstrType : "";
 
     if (strType == "sqlite")
         return InsertQueryArgumentsSqlite(strQuery, pArgs);
@@ -607,8 +607,8 @@ SString CDatabaseManagerImpl::InsertQueryArguments(SConnectionHandle hConnection
 SString CDatabaseManagerImpl::InsertQueryArguments(SConnectionHandle hConnection, const char* szQuery, va_list vl)
 {
     // Determine connection type
-    SString* pstrType = MapFind(m_ConnectionTypeMap, hConnection);
-    SString  strType = pstrType ? *pstrType : "";
+    std::string* pstrType = MapFind(m_ConnectionTypeMap, hConnection);
+    std::string  strType = pstrType ? *pstrType : "";
 
     if (strType == "sqlite")
         return InsertQueryArgumentsSqlite(szQuery, vl);
diff --git a/Server/mods/deathmatch/logic/CGame.cpp b/Server/mods/deathmatch/logic/CGame.cpp
index d4efea393f..51dc656f21 100644
--- a/Server/mods/deathmatch/logic/CGame.cpp
+++ b/Server/mods/deathmatch/logic/CGame.cpp
@@ -709,7 +709,7 @@ bool CGame::Start(int iArgumentCount, char* szArguments[])
     if (m_pMainConfig->IsHTTPEnabled())
     {
         // Slight hack for internal HTTPD: Listen on all IPs if multiple IPs declared
-        SString strUseIP = (strServerIP == strServerIPList) ? strServerIP : "";
+        SString strUseIP = strServerIP == strServerIPList ? strServerIP : SString{};
         if (!m_pHTTPD->StartHTTPD(strUseIP, m_pMainConfig->GetHTTPPort()))
         {
             CLogger::ErrorPrintf("Could not start HTTP server on interface '%s' and port '%u'!\n", strUseIP.c_str(), m_pMainConfig->GetHTTPPort());
diff --git a/Server/mods/deathmatch/logic/CPerfStat.BandwidthUsage.cpp b/Server/mods/deathmatch/logic/CPerfStat.BandwidthUsage.cpp
index 8659a5534c..7b442ab53a 100644
--- a/Server/mods/deathmatch/logic/CPerfStat.BandwidthUsage.cpp
+++ b/Server/mods/deathmatch/logic/CPerfStat.BandwidthUsage.cpp
@@ -626,7 +626,7 @@ void CPerfStatBandwidthUsageImpl::GetStats(CPerfStatResult* pResult, const std::
                     row[c++] = CPerfStatManager::GetScaledByteString(item.llGameRecv);
                     row[c++] = CPerfStatManager::GetScaledByteString(item.llGameSent);
                     if (bShowSentLoss[t])
-                        row[c++] = item.llGameResent ? CPerfStatManager::GetPercentString(item.llGameResent, item.llGameSent) : "";
+                        row[c++] = item.llGameResent ? CPerfStatManager::GetPercentString(item.llGameResent, item.llGameSent) : SString{};
                     row[c++] = CPerfStatManager::GetScaledByteString(item.llHttpSent);
                     if (bShowBlocked[t])
                         row[c++] = CPerfStatManager::GetScaledByteString(item.llGameRecvBlocked);
diff --git a/Server/mods/deathmatch/logic/CPerfStat.FunctionTiming.cpp b/Server/mods/deathmatch/logic/CPerfStat.FunctionTiming.cpp
index 9928f432fa..59bd3f324f 100644
--- a/Server/mods/deathmatch/logic/CPerfStat.FunctionTiming.cpp
+++ b/Server/mods/deathmatch/logic/CPerfStat.FunctionTiming.cpp
@@ -421,10 +421,10 @@ void CPerfStatFunctionTimingImpl::GetStats(CPerfStatResult* pResult, const std::
             row[c++] = SString("%2.0f ms", prev5s.fPeakMs);
             row[c++] = SString("%2.0f ms (%s)", prev5s.fResBiggestMs, *prev5s.strResBiggestMsName);
 
-            row[c++] = prev5s.uiTotalBytes < 10 ? "" : SString("%s", *CPerfStatManager::GetScaledByteString(prev5s.uiTotalBytes));
+            row[c++] = prev5s.uiTotalBytes < 10 ? SString{} : SString("%s", *CPerfStatManager::GetScaledByteString(prev5s.uiTotalBytes));
             // row[c++] = prev5s.uiPeakBytes < 10 ? "" : SString ( "%s ", *CPerfStatManager::GetScaledByteString( prev5s.uiPeakBytes ) );
             row[c++] = prev5s.uiResBiggestBytes < 10
-                           ? ""
+                           ? SString{}
                            : SString("%s (%s)", *CPerfStatManager::GetScaledByteString(prev5s.uiResBiggestBytes), *prev5s.strResBiggestBytesName);
         }
 
@@ -434,10 +434,10 @@ void CPerfStatFunctionTimingImpl::GetStats(CPerfStatResult* pResult, const std::
         row[c++] = SString("%2.0f ms", prev60s.fPeakMs);
         row[c++] = SString("%2.0f ms (%s)", prev60s.fResBiggestMs, *prev60s.strResBiggestMsName);
 
-        row[c++] = prev60s.uiTotalBytes < 10 ? "" : SString("%s ", *CPerfStatManager::GetScaledByteString(prev60s.uiTotalBytes));
+        row[c++] = prev60s.uiTotalBytes < 10 ? SString{} : SString("%s ", *CPerfStatManager::GetScaledByteString(prev60s.uiTotalBytes));
         // row[c++] = prev60s.uiPeakBytes < 10 ? "" : SString ( "%s ", *CPerfStatManager::GetScaledByteString( prev60s.uiPeakBytes ) );
         row[c++] = prev60s.uiResBiggestBytes < 10
-                       ? ""
+                       ? SString{}
                        : SString("%s (%s)", *CPerfStatManager::GetScaledByteString(prev60s.uiResBiggestBytes), *prev60s.strResBiggestBytesName);
     }
 }
diff --git a/Server/mods/deathmatch/logic/CPerfStat.LuaMemory.cpp b/Server/mods/deathmatch/logic/CPerfStat.LuaMemory.cpp
index 0423cf7eea..93bbaff548 100644
--- a/Server/mods/deathmatch/logic/CPerfStat.LuaMemory.cpp
+++ b/Server/mods/deathmatch/logic/CPerfStat.LuaMemory.cpp
@@ -292,8 +292,8 @@ void CPerfStatLuaMemoryImpl::GetLuaMemoryStats(CPerfStatResult* pResult, const s
 
         // Some extra 'all VM' things
         c += 6;
-        row[c++] = !g_pStats->iDbJobDataCount ? "-" : SString("%d", g_pStats->iDbJobDataCount);
-        row[c++] = g_pStats->iDbConnectionCount - 2 == 0 ? "-" : SString("%d", g_pStats->iDbConnectionCount - 2);
+        row[c++] = !g_pStats->iDbJobDataCount ? "-" : std::to_string(g_pStats->iDbJobDataCount);
+        row[c++] = g_pStats->iDbConnectionCount - 2 == 0 ? "-" : std::to_string(g_pStats->iDbConnectionCount - 2);
     }
 
     // For each VM
@@ -321,12 +321,12 @@ void CPerfStatLuaMemoryImpl::GetLuaMemoryStats(CPerfStatResult* pResult, const s
 
         row[c++] = SString("%d KB", LuaMainMemory.Current);
         row[c++] = SString("%d KB", LuaMainMemory.Max);
-        row[c++] = !LuaMainMemory.OpenXMLFiles ? "-" : SString("%d", LuaMainMemory.OpenXMLFiles);
-        row[c++] = !LuaMainMemory.OpenFiles ? "-" : SString("%d", LuaMainMemory.OpenFiles);
-        row[c++] = !LuaMainMemory.Refs ? "-" : SString("%d", LuaMainMemory.Refs);
-        row[c++] = !LuaMainMemory.TimerCount ? "-" : SString("%d", LuaMainMemory.TimerCount);
-        row[c++] = !LuaMainMemory.ElementCount ? "-" : SString("%d", LuaMainMemory.ElementCount);
-        row[c++] = !LuaMainMemory.TextDisplayCount ? "-" : SString("%d", LuaMainMemory.TextDisplayCount);
-        row[c++] = !LuaMainMemory.TextItemCount ? "-" : SString("%d", LuaMainMemory.TextItemCount);
+        row[c++] = !LuaMainMemory.OpenXMLFiles ? SString{"-"} : SString("%d", LuaMainMemory.OpenXMLFiles);
+        row[c++] = !LuaMainMemory.OpenFiles ? SString{"-"} : SString("%d", LuaMainMemory.OpenFiles);
+        row[c++] = !LuaMainMemory.Refs ? SString{"-"} : SString("%d", LuaMainMemory.Refs);
+        row[c++] = !LuaMainMemory.TimerCount ? SString{"-"} : SString("%d", LuaMainMemory.TimerCount);
+        row[c++] = !LuaMainMemory.ElementCount ? SString{"-"} : SString("%d", LuaMainMemory.ElementCount);
+        row[c++] = !LuaMainMemory.TextDisplayCount ? SString{"-"} : SString("%d", LuaMainMemory.TextDisplayCount);
+        row[c++] = !LuaMainMemory.TextItemCount ? SString{"-"} : SString("%d", LuaMainMemory.TextItemCount);
     }
 }
diff --git a/Server/mods/deathmatch/logic/CPerfStat.LuaTiming.cpp b/Server/mods/deathmatch/logic/CPerfStat.LuaTiming.cpp
index 74b6eaad00..4c76a3cc9b 100644
--- a/Server/mods/deathmatch/logic/CPerfStat.LuaTiming.cpp
+++ b/Server/mods/deathmatch/logic/CPerfStat.LuaTiming.cpp
@@ -430,9 +430,9 @@ void CPerfStatLuaTimingImpl::OutputTimingBlock(CPerfStatResult* pResult, const C
 
             double total_p = total_s / double(threshList[i]) * 100;
 
-            row[c++] = total_p > 0.005 ? SString("%2.2f%%", total_p) : "-";
-            row[c++] = total_s > 0.0005 ? SString("%2.3f", total_s) : "-";
-            row[c++] = p->prev.calls > 0 ? SString("%d", p->prev.calls) : "";
+            row[c++] = total_p > 0.005 ? SString("%2.2f%%", total_p) : SString{"-"};
+            row[c++] = total_s > 0.0005 ? SString("%2.3f", total_s) : SString{"-"};
+            row[c++] = p->prev.calls > 0 ? SString("%d", p->prev.calls) : SString{};
             row[c++] = avg_s > 0.0005 ? SString("%2.3f", avg_s).c_str() : bSubBlock ? "-" : "";
             row[c++] = max_s > 0.0005 ? SString("%2.3f", max_s).c_str() : bSubBlock ? "-" : "";
         }
diff --git a/Server/mods/deathmatch/logic/CPerfStat.PlayerPacketUsage.cpp b/Server/mods/deathmatch/logic/CPerfStat.PlayerPacketUsage.cpp
index 8b7bf8bfae..194f9fb021 100644
--- a/Server/mods/deathmatch/logic/CPerfStat.PlayerPacketUsage.cpp
+++ b/Server/mods/deathmatch/logic/CPerfStat.PlayerPacketUsage.cpp
@@ -408,11 +408,11 @@ void CPerfStatPlayerPacketUsageImpl::OutputTimeSpanBlock(CPerfStatResult* pResul
             const CTimeSpan* p = timeSpanList[i];
             const CTopValue& value = (p->prev.data[0].uiPktsPerSec > p->acc.data[0].uiPktsPerSec) ? p->prev.data[iTopPos] : p->acc.data[iTopPos];
 
-            row[c++] = value.uiPktsPerSec ? SString("%d", value.uiPktsPerSec) : "-";
+            row[c++] = value.uiPktsPerSec ? std::to_string(value.uiPktsPerSec) : "-";
             if (bDetail)
             {
-                row[c++] = value.uiBytesInPerSec ? SString("%d", value.uiBytesInPerSec) : "-";
-                row[c++] = value.uiBytesOutPerSec ? SString("%d", value.uiBytesOutPerSec) : "-";
+                row[c++] = value.uiBytesInPerSec ? std::to_string(value.uiBytesInPerSec) : "-";
+                row[c++] = value.uiBytesOutPerSec ? std::to_string(value.uiBytesOutPerSec) : "-";
                 row[c++] = value.strSerial;
             }
             row[c++] = value.strName;
diff --git a/Server/mods/deathmatch/logic/CResourceManager.cpp b/Server/mods/deathmatch/logic/CResourceManager.cpp
index b3b2d2f9c1..d3205ebc09 100644
--- a/Server/mods/deathmatch/logic/CResourceManager.cpp
+++ b/Server/mods/deathmatch/logic/CResourceManager.cpp
@@ -840,11 +840,11 @@ void CResourceManager::ProcessQueue()
         }
         else if (sItem.eQueue == QUEUE_REFRESH)
         {
-            Refresh(false, sItem.pResource ? sItem.pResource->GetName() : "");
+            Refresh(false, sItem.pResource ? sItem.pResource->GetName() : SString{});
         }
         else if (sItem.eQueue == QUEUE_REFRESHALL)
         {
-            Refresh(true, sItem.pResource ? sItem.pResource->GetName() : "");
+            Refresh(true, sItem.pResource ? sItem.pResource->GetName() : SString{});
         }
     }
 }
diff --git a/Server/mods/deathmatch/logic/luadefs/CLuaDatabaseDefs.cpp b/Server/mods/deathmatch/logic/luadefs/CLuaDatabaseDefs.cpp
index bb5a1d1d16..77d0dd2ff4 100644
--- a/Server/mods/deathmatch/logic/luadefs/CLuaDatabaseDefs.cpp
+++ b/Server/mods/deathmatch/logic/luadefs/CLuaDatabaseDefs.cpp
@@ -292,7 +292,7 @@ int CLuaDatabaseDefs::DbConnect(lua_State* luaVM)
                 // Set default values if required
                 GetOption<CDbOptionsMap>(strOptions, "log", bLoggingEnabled, 1);
                 GetOption<CDbOptionsMap>(strOptions, "tag", strLogTag, "script");
-                GetOption<CDbOptionsMap>(strOptions, "queue", strQueueName, (strType == "mysql") ? strHost : DB_SQLITE_QUEUE_NAME_DEFAULT);
+                GetOption<CDbOptionsMap>(strOptions, "queue", strQueueName, strType == "mysql" ? strHost : SString(DB_SQLITE_QUEUE_NAME_DEFAULT));
                 SetOption<CDbOptionsMap>(strOptions, "log", bLoggingEnabled);
                 SetOption<CDbOptionsMap>(strOptions, "tag", strLogTag);
                 SetOption<CDbOptionsMap>(strOptions, "queue", strQueueName);
diff --git a/Server/mods/deathmatch/logic/luadefs/CLuaDefs.cpp b/Server/mods/deathmatch/logic/luadefs/CLuaDefs.cpp
index 8d8e3a3646..7cdbff863b 100644
--- a/Server/mods/deathmatch/logic/luadefs/CLuaDefs.cpp
+++ b/Server/mods/deathmatch/logic/luadefs/CLuaDefs.cpp
@@ -230,8 +230,9 @@ void CLuaDefs::DidUseFunction(lua_CFunction f, lua_State* luaVM)
                 if (pFunction)
                 {
                     CResource* pResource = g_pGame->GetResourceManager()->GetResourceFromLuaState(info.luaVM);
-                    SString    strResourceName = pResource ? pResource->GetName() : "unknown";
-                    CPerfStatFunctionTiming::GetSingleton()->UpdateTiming(strResourceName, pFunction->GetName().c_str(), elapsedTime, uiDeltaBytes);
+                    CPerfStatFunctionTiming::GetSingleton()->UpdateTiming(
+                        pResource ? pResource->GetName() : SString{"unknown"},
+                        pFunction->GetName().c_str(), elapsedTime, uiDeltaBytes);
                 }
             }
 
diff --git a/Server/mods/deathmatch/premake5.lua b/Server/mods/deathmatch/premake5.lua
index ddecdfb179..bd60d3409e 100644
--- a/Server/mods/deathmatch/premake5.lua
+++ b/Server/mods/deathmatch/premake5.lua
@@ -1,4 +1,5 @@
 project "Deathmatch"
+	cppdialect "C++20"
 	language "C++"
 	kind "SharedLib"
 	targetname "deathmatch"
diff --git a/Server/mods/deathmatch/utils/CFunctionUseLogger.cpp b/Server/mods/deathmatch/utils/CFunctionUseLogger.cpp
index 9226de9dfe..83e9c26fee 100644
--- a/Server/mods/deathmatch/utils/CFunctionUseLogger.cpp
+++ b/Server/mods/deathmatch/utils/CFunctionUseLogger.cpp
@@ -74,9 +74,9 @@ void CFunctionUseLogger::OnFunctionUse(lua_State* luaVM, const char* szFunctionN
         return;
 
     CResource* pResource = g_pGame->GetResourceManager()->GetResourceFromLuaState(luaVM);
-    SString    strResourceName = pResource ? pResource->GetName() : "Unknown";
+    SString    strResourceName = pResource ? pResource->GetName() : SString{"Unknown"};
 
-    SString strKey("%s-%s", szFunctionName, *strResourceName);
+    SString strKey("%s-%s", szFunctionName, strResourceName.c_str());
 
     SFuncCallRecord* pItem = MapFind(m_FuncCallRecordMap, strKey);
     if (!pItem)
diff --git a/Shared/mods/deathmatch/logic/luadefs/CLuaUtilDefs.cpp b/Shared/mods/deathmatch/logic/luadefs/CLuaUtilDefs.cpp
index 0b5847fa09..12c0515ca3 100644
--- a/Shared/mods/deathmatch/logic/luadefs/CLuaUtilDefs.cpp
+++ b/Shared/mods/deathmatch/logic/luadefs/CLuaUtilDefs.cpp
@@ -263,7 +263,7 @@ int CLuaUtilDefs::GetUserdataType(lua_State* luaVM)
         else if (iArgument == LUA_TUSERDATA)
             strType = GetUserDataClassName(*((void**)lua_touserdata(luaVM, 1)), luaVM, false);
 
-        strType = strType.empty() ? "userdata" : strType;
+        strType = strType.empty() ? SString{"userdata"} : strType;
 
         lua_pushstring(luaVM, strType.c_str());
         return 1;
diff --git a/Shared/sdk/SString.h b/Shared/sdk/SString.h
index 00c57d0c1e..16ed7f0b0d 100644
--- a/Shared/sdk/SString.h
+++ b/Shared/sdk/SString.h
@@ -30,19 +30,23 @@ class SString : public std::string
 
     SString(const char* szText) : std::string(szText ? szText : "") {}
 
-    explicit SString(const char* szFormat, ...) : std::string()
+    // A hacky way to force the compiler
+    // into properly recognizing varargs vs const char* constructor
+    template <int=0>
+    explicit SString(const char* format, ...) : std::string()
     {
-        if (szFormat)
-        {
-            va_list vl;
+        if (!format)
+            return;
 
-            va_start(vl, szFormat);
-            vFormat(szFormat, vl);
-            va_end(vl);
-        }
+        va_list vl;
+
+        va_start(vl, format);
+        vFormat(format, vl);
+        va_end(vl);
     }
 
-    SString(const std::string& strText) : std::string(strText) {}
+    SString(const std::string& text) : std::string(text) {}
+    SString(std::string&& text) : std::string(std::move(text)) {}
 
     SString& Format(const char* szFormat, ...)
     {
diff --git a/Shared/sdk/SharedUtil.Logging.hpp b/Shared/sdk/SharedUtil.Logging.hpp
index f98b3bbdf6..5c34f3d1ec 100644
--- a/Shared/sdk/SharedUtil.Logging.hpp
+++ b/Shared/sdk/SharedUtil.Logging.hpp
@@ -167,8 +167,8 @@ void SharedUtil::CycleFile(const SString& strPathFilename, uint uiCycleThreshKB,
             // Rename older files .1 .2 etc
             uint    uiNew = uiNumBackups - 1 - i;
             uint    uiOld = uiNumBackups - i;
-            SString strFilenameNewer = strPathFilename + (uiNew ? SString(".%d", uiNew) : "");
-            SString strFilenameOlder = strPathFilename + (uiOld ? SString(".%d", uiOld) : "");
+            SString strFilenameNewer = strPathFilename + (uiNew ? SString(".%d", uiNew) : SString());
+            SString strFilenameOlder = strPathFilename + (uiOld ? SString(".%d", uiOld) : SString());
 
             FileDelete(strFilenameOlder);
             FileRename(strFilenameNewer, strFilenameOlder);
diff --git a/vendor/sparsehash/src/sparsehash/internal/hashtable-common.h b/vendor/sparsehash/src/sparsehash/internal/hashtable-common.h
index bac2b88235..9e49ec890f 100644
--- a/vendor/sparsehash/src/sparsehash/internal/hashtable-common.h
+++ b/vendor/sparsehash/src/sparsehash/internal/hashtable-common.h
@@ -51,7 +51,7 @@ _START_GOOGLE_NAMESPACE_
 
 template <bool> struct SparsehashCompileAssert { };
 #define SPARSEHASH_COMPILE_ASSERT(expr, msg) \
-  __attribute__((unused)) typedef SparsehashCompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
+  [[maybe_unused]] typedef SparsehashCompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
 
 namespace sparsehash_internal {