Index: src_plugins/rbs_routing/map.c
===================================================================
--- src_plugins/rbs_routing/map.c	(revision 38847)
+++ src_plugins/rbs_routing/map.c	(revision 38848)
@@ -286,7 +286,7 @@
 	grbs_inc_ang_update(&rbs->grbs, first);
 
 	last = gdl_last(&tn->arcs);
-	if (first != last)
+	if ((first != last) && (last->r == 0))
 		grbs_inc_ang_update(&rbs->grbs, last);
 
 	return 0;