--- net/if_ppp.c-	Wed Mar 29 13:13:13 2000
+++ net/if_ppp.c	Tue Aug  1 14:04:27 2000
@@ -666,6 +666,9 @@
 	if (ip->ip_tos & IPTOS_LOWDELAY)
 	    m0->m_flags |= M_HIGHPRI;
 	break;
+    case AF_INET6:
+	error = EAFNOSUPPORT;
+	goto bad;
 #endif
     case AF_UNSPEC:
 	address = PPP_ADDRESS(dst->sa_data);