diff --git a/src/drivers/win/window.cpp b/src/drivers/win/window.cpp
index 37291a21..6ab81e43 100644
--- a/src/drivers/win/window.cpp
+++ b/src/drivers/win/window.cpp
@@ -1224,7 +1224,7 @@ void GetMouseData(uint32 (&md)[3])
 	}
 	md[0] += VNSCLIP;
 	md[1] += FSettings.FirstSLine;
-	md[2] = ((mouseb == MK_LBUTTON) ? 1 : 0) | (( mouseb == MK_RBUTTON ) ? 2 : 0);
+	md[2] = ((mouseb & MK_LBUTTON) ? 1 : 0) | (( mouseb & MK_RBUTTON ) ? 2 : 0);
 }
 
 void GetMouseRelative(int32 (&md)[3])
@@ -3234,4 +3234,4 @@ void SaveSnapshotAs()
 	if(GetSaveFileName(&ofn))
 		FCEUI_SetSnapshotAsName(nameo);
 	FCEUI_SaveSnapshotAs();
-}
\ No newline at end of file
+}