diff --git a/common.h b/common.h
index 00b34a3f7..d6637abe4 100644
--- a/common.h
+++ b/common.h
@@ -681,7 +681,7 @@ __declspec(dllimport) int __cdecl omp_in_parallel(void);
 __declspec(dllimport) int __cdecl omp_get_num_procs(void);
 #endif
 
-#if (__STDC_VERSION__ >= 201112L)
+#ifdef HAVE_C11
 #if defined(C_GCC) && ( __GNUC__ < 7) 
 // workaround for GCC bug 65467
 #ifndef _Atomic