diff --git a/sys/netinet6/in6_mcast.c b/sys/netinet6/in6_mcast.c
index bd202e76c6b6..472a3434ebad 100644
--- a/sys/netinet6/in6_mcast.c
+++ b/sys/netinet6/in6_mcast.c
@@ -372,9 +372,16 @@ in6_getmulti(struct ifnet *ifp, const struct in6_addr *group,
 	IN6_MULTI_LIST_LOCK();
 	IF_ADDR_WLOCK(ifp);
 	NET_EPOCH_ENTER_ET(et);
-	inm = in6m_lookup_locked(ifp, group);
+	/* Does ifp support IPv6? */
+	if (ifp->if_afdata[AF_INET6] == NULL)
+		error = ENODEV;
+	else
+		inm = in6m_lookup_locked(ifp, group);
 	NET_EPOCH_EXIT_ET(et);
 
+	if (error != 0)
+		goto out_locked;
+
 	if (inm != NULL) {
 		/*
 		 * If we already joined this group, just bump the