diff --git a/epan/dfilter/grammar.lemon b/epan/dfilter/grammar.lemon
index 4392ac5b3d..45cd1dfb15 100644
--- a/epan/dfilter/grammar.lemon
+++ b/epan/dfilter/grammar.lemon
@@ -16,7 +16,7 @@
 
 #include "grammar.h"
 
-#ifdef _WIN32
+#ifdef _MSC_VER
 #pragma warning(disable:4671)
 #endif