diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 0d873c58e5167a8855d62de14d88dc738bc70e48..f1fc48e9689c039135efcbebac7eb9f4ba952c9c 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -728,8 +728,10 @@ static int sctp_v6_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr)
 			sctp_v6_map_v4(addr);
 	}
 
-	if (addr->sa.sa_family == AF_INET)
+	if (addr->sa.sa_family == AF_INET) {
+		memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero));
 		return sizeof(struct sockaddr_in);
+	}
 	return sizeof(struct sockaddr_in6);
 }