diff --git a/src/windows/pluginloader/pluginloader.c b/src/windows/pluginloader/pluginloader.c
index 751e072..7a4589d 100644
--- a/src/windows/pluginloader/pluginloader.c
+++ b/src/windows/pluginloader/pluginloader.c
@@ -190,7 +190,7 @@ static inline WPARAM wParamFromX11State(uint32_t state){
 	if (state & Button3Mask) wParam |= MK_RBUTTON;
 	if (state & Button2Mask) wParam |= MK_MBUTTON;
 	if (state & ShiftMask)   wParam |= MK_SHIFT;
-	if (state & ControlMask) wParam |= MK_CONTROL;
+	if (state & ControlMask_) wParam |= MK_CONTROL;
 	return wParam;
 }
 
diff --git a/src/windows/pluginloader/pluginloader.h b/src/windows/pluginloader/pluginloader.h
index ffe89a7..a1ebabc 100644
--- a/src/windows/pluginloader/pluginloader.h
+++ b/src/windows/pluginloader/pluginloader.h
@@ -149,7 +149,7 @@ typedef unsigned long int XID;
 
 #define ShiftMask	(1<<0)
 #define LockMask	(1<<1)
-#define ControlMask	(1<<2)
+#define ControlMask_	(1<<2)
 #define Button1Mask	(1<<8)
 #define Button2Mask	(1<<9)
 #define Button3Mask	(1<<10)