diff --git a/src/dashbls/depends/mimalloc/include/mimalloc-atomic.h b/src/dashbls/depends/mimalloc/include/mimalloc-atomic.h
index 7ad5da5851336..879245ccb4503 100644
--- a/src/dashbls/depends/mimalloc/include/mimalloc-atomic.h
+++ b/src/dashbls/depends/mimalloc/include/mimalloc-atomic.h
@@ -39,7 +39,11 @@ terms of the MIT license. A copy of the license can be found in the file
 #include <stdatomic.h>
 #define  mi_atomic(name)        atomic_##name
 #define  mi_memory_order(name)  memory_order_##name
-#define  MI_ATOMIC_VAR_INIT(x)  ATOMIC_VAR_INIT(x)
+#if !defined(ATOMIC_VAR_INIT) || (__STDC_VERSION__ >= 202311L) // C23, ATOMIC_VAR_INIT was removed
+ #define MI_ATOMIC_VAR_INIT(x)  x
+#else
+ #define MI_ATOMIC_VAR_INIT(x)  ATOMIC_VAR_INIT(x)
+#endif
 #endif
 
 // Various defines for all used memory orders in mimalloc