Index: art.c
===================================================================
RCS file: /cvs/src/sys/net/art.c,v
retrieving revision 1.8
diff -u -p -r1.8 art.c
--- art.c	12 Nov 2015 14:29:04 -0000	1.8
+++ art.c	24 Nov 2015 11:55:43 -0000
@@ -349,6 +349,9 @@ art_insert(struct art_root *ar, struct a
 
 	/* Default route */
 	if (plen == 0) {
+		if at->at_default != NULL)
+			return (at->at_default);
+
 		art_table_ref(ar, at);
 		at->at_default = an;
 		return (an);