diff --git a/compat/win32/fscache.c b/compat/win32/fscache.c
index 589d9c81315f42..cbd90ececf6b37 100644
--- a/compat/win32/fscache.c
+++ b/compat/win32/fscache.c
@@ -670,7 +670,9 @@ int fscache_is_mount_point(struct strbuf *path)
 {
 	int dirlen, base, len;
 #pragma GCC diagnostic push
+#ifdef __clang__
 #pragma GCC diagnostic ignored "-Wflexible-array-extensions"
+#endif
 	struct heap_fsentry key[2];
 #pragma GCC diagnostic pop
 	struct fsentry *fse;