--- src/sys/net/ppp/if_ppp.c	2005/12/11 13:00:17	1.28
+++ src/sys/net/ppp/if_ppp.c	2006/02/14 12:31:29	1.28.2.1
@@ -867,9 +867,8 @@ pppoutput(struct ifnet *ifp, struct mbuf
 	        error = 0;
 	    }
 	} else {
-	    lwkt_serialize_enter(sc->sc_if.if_serializer);
+	    ASSERT_SERIALIZED(sc->sc_if.if_serializer);
 	    error = ifq_enqueue(&sc->sc_if.if_snd, m0, &pktattr);
-	    lwkt_serialize_exit(sc->sc_if.if_serializer);
 	}
 	if (error) {
 	    crit_exit();