diff --git a/reactos/include/crt/malloc.h b/reactos/include/crt/malloc.h
index e876d61b1ce..9ea62af81db 100644
--- a/reactos/include/crt/malloc.h
+++ b/reactos/include/crt/malloc.h
@@ -25,7 +25,7 @@ extern "C" {
 #endif
 
 #ifndef _STATIC_ASSERT
-#define _STATIC_ASSERT(expr) typedef char __static_assert_t[(expr)]
+#define _STATIC_ASSERT(expr) typedef char __static_assert_t[(expr)?1:-1]
 #endif
 
 /* Return codes for _heapwalk()  */