diff --git a/include/cmor.h b/include/cmor.h
index 54fbadf4..ef7dc953 100644
--- a/include/cmor.h
+++ b/include/cmor.h
@@ -422,6 +422,9 @@ typedef struct cmor_variable_def_ {
     int shuffle;
     int deflate;
     int deflate_level;
+    int zstandard_level;
+    int quantize_mode;
+    int quantize_nsd;
     char required[CMOR_MAX_STRING];
     char realm[CMOR_MAX_STRING];
     char frequency[CMOR_MAX_STRING];