diff --git a/MdePkg/Include/Protocol/DevicePath.h b/MdePkg/Include/Protocol/DevicePath.h
index f7db9a315a..9b40530c38 100644
--- a/MdePkg/Include/Protocol/DevicePath.h
+++ b/MdePkg/Include/Protocol/DevicePath.h
@@ -19,6 +19,8 @@
 #ifndef __EFI_DEVICE_PATH_PROTOCOL_H__
 #define __EFI_DEVICE_PATH_PROTOCOL_H__
 
+#include <Guid/PcAnsi.h>
+
 //
 // Device Path protocol
 //