diff --git a/reactos/dll/win32/rpcrt4/ndr_marshall.c b/reactos/dll/win32/rpcrt4/ndr_marshall.c
index 85d0a3cd85b..f0482e62dd3 100644
--- a/reactos/dll/win32/rpcrt4/ndr_marshall.c
+++ b/reactos/dll/win32/rpcrt4/ndr_marshall.c
@@ -6159,6 +6159,7 @@ static LONG unmarshall_discriminant(PMIDL_STUB_MESSAGE pStubMsg,
     case RPC_FC_WCHAR:
     case RPC_FC_SHORT:
     case RPC_FC_USHORT:
+    case RPC_FC_ENUM16:
     {
         USHORT d;
         align_pointer(&pStubMsg->Buffer, sizeof(USHORT));