diff --git a/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.h b/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.h
index 0f43802fda..aab3d24e67 100644
--- a/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.h
+++ b/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.h
@@ -227,7 +227,7 @@ EFIAPI
 InsertKeyCode (
   IN OUT  USB_KB_BUFFER *KeyboardBuffer,
   IN      UINT8         Key,
-  IN      UINT8         Down
+  IN      BOOLEAN       Down
   );
 
 /**