diff --git a/Source/Project64/N64 System/Cheat Class.cpp b/Source/Project64/N64 System/Cheat Class.cpp
index c4b330ba4..4151c04e6 100644
--- a/Source/Project64/N64 System/Cheat Class.cpp	
+++ b/Source/Project64/N64 System/Cheat Class.cpp	
@@ -11,6 +11,7 @@
 #include "stdafx.h"
 
 #include <commctrl.h>
+#include <windowsx.h>
 #include "Settings/SettingType/SettingsType-Cheats.h"
 
 enum { WM_EDITCHEAT           = WM_USER + 0x120 };