diff --git a/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h b/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h
index 2498a58fcb..666e81c7f3 100644
--- a/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h
+++ b/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h
@@ -421,7 +421,7 @@ EFI_STATUS
 EFIAPI
 MnpGetModeData (
   IN  EFI_MANAGED_NETWORK_PROTOCOL     *This,
-  OUT EFI_MANAGED_NETWORK_CONFIG_DATA  *MnpConfigData, OPTIONAL
+  OUT EFI_MANAGED_NETWORK_CONFIG_DATA  *MnpConfigData  OPTIONAL,
   OUT EFI_SIMPLE_NETWORK_MODE          *SnpModeData    OPTIONAL
   );