1 files changed, 1 insertions, 1 deletions
diff --git a/sem_open.c b/sem_open.c
index bf48c83..fb1cc54 100644
--- a/sem_open.c
+++ b/sem_open.c
@@ -46,7 +46,7 @@
 #include "implement.h"
 
 /* ignore warning "unreferenced formal parameter" */
-#ifdef _MSC_VER
+#if defined(_MSC_VER)
 #pragma warning( disable : 4100 )
 #endif