diff --git a/libraries/ZWidget/src/window/window.cpp b/libraries/ZWidget/src/window/window.cpp
index 234be61e4..b67b1a296 100644
--- a/libraries/ZWidget/src/window/window.cpp
+++ b/libraries/ZWidget/src/window/window.cpp
@@ -2,7 +2,7 @@
 #include "window/window.h"
 #include <stdexcept>
 
-#ifdef WIN32
+#ifdef _WIN32
 
 #include "win32/win32window.h"