diff --git a/reactos/ntoskrnl/lpc/reply.c b/reactos/ntoskrnl/lpc/reply.c
index ae42bb28c44..1aeba6e9acf 100644
--- a/reactos/ntoskrnl/lpc/reply.c
+++ b/reactos/ntoskrnl/lpc/reply.c
@@ -263,6 +263,12 @@ NtReplyWaitReceivePortEx(IN  HANDLE		PortHandle,
    Request = EiDequeueMessagePort(Port);
    KeReleaseSpinLock(&Port->Lock, oldIrql);
 
+   if (Request == NULL)
+     {
+       ObDereferenceObject(Port);
+       return STATUS_UNSUCCESSFUL;
+     }
+
    if (Request->Message.u2.s2.Type == LPC_CONNECTION_REQUEST)
      {
        PORT_MESSAGE Header;