diff --git a/src/closures/hello_closure.rs b/src/closures/hello_closure.rs
index 2d3fe31b3..a90f8c5e6 100644
--- a/src/closures/hello_closure.rs
+++ b/src/closures/hello_closure.rs
@@ -134,6 +134,14 @@ pub extern "C" fn z_closure_hello_loan(
     closure.as_loaned_c_type_ref()
 }
 
+/// Mutably norrows closure.
+#[no_mangle]
+pub extern "C" fn z_closure_hello_loan_mut(
+    closure: &mut z_owned_closure_hello_t,
+) -> &mut z_loaned_closure_hello_t {
+    closure.as_loaned_c_type_mut()
+}
+
 /// @brief Constructs closure.
 /// A closure is a structure that contains all the elements for stateful, memory-leak-free callbacks:
 ///
diff --git a/src/closures/query_closure.rs b/src/closures/query_closure.rs
index f3d08b2aa..8fab9a27b 100644
--- a/src/closures/query_closure.rs
+++ b/src/closures/query_closure.rs
@@ -134,6 +134,14 @@ pub extern "C" fn z_closure_query_loan(
     closure.as_loaned_c_type_ref()
 }
 
+/// Mutably borrows closure.
+#[no_mangle]
+pub extern "C" fn z_closure_query_loan_mut(
+    closure: &mut z_owned_closure_query_t,
+) -> &mut z_loaned_closure_query_t {
+    closure.as_loaned_c_type_mut()
+}
+
 /// @brief Constructs closure.
 ///
 /// Closures are not guaranteed not to be called concurrently.
diff --git a/src/closures/reply_closure.rs b/src/closures/reply_closure.rs
index 31b64d79e..252033d89 100644
--- a/src/closures/reply_closure.rs
+++ b/src/closures/reply_closure.rs
@@ -138,6 +138,14 @@ pub extern "C" fn z_closure_reply_loan(
     closure.as_loaned_c_type_ref()
 }
 
+/// Mutably borrows closure.
+#[no_mangle]
+pub extern "C" fn z_closure_reply_loan_mut(
+    closure: &mut z_owned_closure_reply_t,
+) -> &mut z_loaned_closure_reply_t {
+    closure.as_loaned_c_type_mut()
+}
+
 /// @brief Constructs closure.
 ///
 /// Closures are not guaranteed not to be called concurrently.
diff --git a/src/closures/sample_closure.rs b/src/closures/sample_closure.rs
index d568b3c45..710a5f0c2 100644
--- a/src/closures/sample_closure.rs
+++ b/src/closures/sample_closure.rs
@@ -136,6 +136,14 @@ pub extern "C" fn z_closure_sample_loan(
     closure.as_loaned_c_type_ref()
 }
 
+/// Mutably borrows closure.
+#[no_mangle]
+pub extern "C" fn z_closure_sample_loan_mut(
+    closure: &mut z_owned_closure_sample_t,
+) -> &mut z_loaned_closure_sample_t {
+    closure.as_loaned_c_type_mut()
+}
+
 /// @brief Constructs closure.
 ///
 /// Closures are not guaranteed not to be called concurrently.
diff --git a/src/closures/zenohid_closure.rs b/src/closures/zenohid_closure.rs
index 2aadb0111..e6b887899 100644
--- a/src/closures/zenohid_closure.rs
+++ b/src/closures/zenohid_closure.rs
@@ -131,6 +131,14 @@ pub extern "C" fn z_closure_zid_loan(closure: &z_owned_closure_zid_t) -> &z_loan
     closure.as_loaned_c_type_ref()
 }
 
+/// @brief Mutably borrows closure.
+#[no_mangle]
+pub extern "C" fn z_closure_zid_loan_mut(
+    closure: &z_owned_closure_zid_t,
+) -> &z_loaned_closure_zid_t {
+    closure.as_loaned_c_type_ref()
+}
+
 /// @brief Constructs closure.
 ///
 /// Closures are not guaranteed not to be called concurrently.