diff --git a/reactos/ntoskrnl/io/iomgr/iofunc.c b/reactos/ntoskrnl/io/iomgr/iofunc.c
index 63f0ad48564..5d6f7ab31c1 100644
--- a/reactos/ntoskrnl/io/iomgr/iofunc.c
+++ b/reactos/ntoskrnl/io/iomgr/iofunc.c
@@ -13,7 +13,7 @@
 #include <ntoskrnl.h>
 #define NDEBUG
 #include <debug.h>
-#include "internal\io_i.h"
+#include "internal/io_i.h"
 
 /* PRIVATE FUNCTIONS *********************************************************/