diff --git a/MdeModulePkg/Library/ExtendedHiiLib/ExtendedHiiLib.c b/MdeModulePkg/Library/ExtendedHiiLib/ExtendedHiiLib.c
index 48f8df483c..4aaf123f68 100644
--- a/MdeModulePkg/Library/ExtendedHiiLib/ExtendedHiiLib.c
+++ b/MdeModulePkg/Library/ExtendedHiiLib/ExtendedHiiLib.c
@@ -24,7 +24,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/MemoryAllocationLib.h>
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/DevicePathLib.h>
-#include <Guid\MdeModuleHii.h>
+#include <Guid/MdeModuleHii.h>
 
 
 //