diff --git a/reactos/drivers/input/mouclass/mouclass.c b/reactos/drivers/input/mouclass/mouclass.c
index dd9c461c1f4..4c92e724720 100644
--- a/reactos/drivers/input/mouclass/mouclass.c
+++ b/reactos/drivers/input/mouclass/mouclass.c
@@ -12,7 +12,7 @@
 */
 
 #include <ddk/ntddk.h>
-#include "..\include\mouse.h"
+#include "../include/mouse.h"
 #include "mouclass.h"
 
 BOOLEAN AlreadyOpened = FALSE;