diff --git a/git-compat-util.h b/git-compat-util.h
index f587749b7cf6a74be376792eb0ad70b7e5e4f597..bf3a053a26a7436f46c820fe5782ba7d10934df1 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -750,7 +750,7 @@ void git_qsort(void *base, size_t nmemb, size_t size,
 #endif
 #endif
 
-#if defined(__GNUC__) || (_MSC_VER >= 1400)
+#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
 #define HAVE_VARIADIC_MACROS 1
 #endif