diff --git a/DSView/main.cpp b/DSView/main.cpp
index 39df2e69..7a4845d2 100755
--- a/DSView/main.cpp
+++ b/DSView/main.cpp
@@ -38,7 +38,7 @@
 #include "config.h"
 #include "pv/appcontrol.h"
 
-#if _WIN32
+#ifdef _WIN32
 #include <windows.h>
 #endif