diff --git a/sys/netinet6/sctp6_usrreq.c b/sys/netinet6/sctp6_usrreq.c
index 6f5d639e636..fcbb566b53d 100644
--- a/sys/netinet6/sctp6_usrreq.c
+++ b/sys/netinet6/sctp6_usrreq.c
@@ -771,7 +771,8 @@ sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
 			return (EINVAL);
 		}
 	}
-	if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+	if ((addr->sa_family == AF_INET6) &&
+	    IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 		struct sockaddr_in sin;
 
 		/* convert v4-mapped into v4 addr and send */
@@ -909,7 +910,8 @@ sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
 			return (EINVAL);
 		}
 	}
-	if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+	if ((addr->sa_family == AF_INET6) &&
+	    IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 		/* convert v4-mapped into v4 addr */
 		in6_sin6_2_sin(&store.sin, sin6);
 		addr = &store.sa;