--- rsync-2.6.2/socket.c.orig	2004-05-08 23:25:11.979473336 +0200
+++ rsync-2.6.2/socket.c	2004-05-08 23:27:13.255036648 +0200
@@ -379,8 +379,8 @@
 
 #ifdef IPV6_V6ONLY
 		if (resp->ai_family == AF_INET6) {
-			setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
-				   (char *)&one, sizeof one);
+		    if(setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&one, sizeof one) < 0)
+			continue;
 		}
 #endif