diff --git a/sys/netinet6/nd6_rtr.c b/sys/netinet6/nd6_rtr.c
index e2d2a8d0493..258a59c144d 100644
--- a/sys/netinet6/nd6_rtr.c
+++ b/sys/netinet6/nd6_rtr.c
@@ -546,7 +546,9 @@ defrouter_delreq(dr, dofree)
 		  (struct sockaddr *)&mask,
 		  RTF_GATEWAY, &oldrt);
 	if (oldrt) {
+#ifdef ND6_USE_RTSOCK
 		defrouter_msg(RTM_DELETE, oldrt);
+#endif
 		if (oldrt->rt_refcnt <= 0) {
 			/*
 			 * XXX: borrowed from the RTM_DELETE case of