diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index 30053492d8a..f5c14ef8d56 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -162,7 +162,7 @@ float log2f(float f)
 #endif
 
 
-#if __STDC_VERSION__ < 199901L && (!defined(__cplusplus) || !defined(_GNU_SOURCE))
+#if __STDC_VERSION__ < 199901L && (!defined(__cplusplus) || defined(_MSC_VER))
 static INLINE long int
 lrint(double d)
 {