diff --git a/MdeModulePkg/Include/Library/GenericBdsLib.h b/MdeModulePkg/Include/Library/GenericBdsLib.h
index 9266a86bfe..9c5d967c7a 100644
--- a/MdeModulePkg/Include/Library/GenericBdsLib.h
+++ b/MdeModulePkg/Include/Library/GenericBdsLib.h
@@ -536,7 +536,7 @@ BdsLibUpdateFvFileDevicePath (
 
 EFI_STATUS
 BdsLibConnectUsbDevByShortFormDP (
-  IN CHAR8                      HostControllerPI,
+  IN UINT8                      HostControllerPI,
   IN EFI_DEVICE_PATH_PROTOCOL   *RemainingDevicePath
   );
   
diff --git a/MdeModulePkg/Library/GenericBdsLib/BdsConnect.c b/MdeModulePkg/Library/GenericBdsLib/BdsConnect.c
index 98a6709c69..54a650dcea 100644
--- a/MdeModulePkg/Library/GenericBdsLib/BdsConnect.c
+++ b/MdeModulePkg/Library/GenericBdsLib/BdsConnect.c
@@ -339,7 +339,7 @@ BdsLibConnectAllDriversToAllControllers (
 **/
 EFI_STATUS
 BdsLibConnectUsbDevByShortFormDP(
-  IN CHAR8                      HostControllerPI,
+  IN UINT8                      HostControllerPI,
   IN EFI_DEVICE_PATH_PROTOCOL   *RemainingDevicePath
   )
 {