diff -Naur libnl-3.2.22-orig/lib/route/link.c libnl-3.2.22/lib/route/link.c
--- libnl-3.2.22-orig/lib/route/link.c	2013-02-24 11:06:54.000000000 -0500
+++ libnl-3.2.22/lib/route/link.c	2013-09-23 15:42:29.167629304 -0400
@@ -1743,10 +1743,11 @@
 	link->l_family = family;
 	link->ce_mask |= LINK_ATTR_FAMILY;
 
-	if (link->l_af_ops)
+	if (link->l_af_ops) {
 		af_free(link, link->l_af_ops,
 			link->l_af_data[link->l_af_ops->ao_family], NULL);
-
+		link->l_af_data[link->l_af_ops->ao_family] = NULL;
+	}
 	link->l_af_ops = af_lookup_and_alloc(link, family);
 }