diff --git a/src/edge.c b/src/edge.c
index c9252726..00ce6fef 100644
--- a/src/edge.c
+++ b/src/edge.c
@@ -118,6 +118,16 @@ void edge_del(edge_t *e) {
 	splay_delete(e->from->edge_tree, e);
 }
 
+bool edge_update_weigth(edge_t *e, int weight) {
+		splay_node_t *oldnode = splay_unlink(edge_weight_tree, e);
+		if (!oldnode)
+			return false;
+
+		/* avg_rtt is in ms */
+		e->weight = e->avg_rtt*10;
+		oldnode->data = e;
+		splay_insert_node(edge_weight_tree, oldnode);
+		return true;
 }
 
 edge_t *lookup_edge(node_t *from, node_t *to) {
diff --git a/src/edge.h b/src/edge.h
index e98ade88..aaf421ef 100644
--- a/src/edge.h
+++ b/src/edge.h
@@ -51,6 +51,7 @@ extern void free_edge_tree(splay_tree_t *);
 extern void edge_add(edge_t *);
 extern void edge_del(edge_t *);
 extern edge_t *lookup_edge(struct node_t *, struct node_t *);
+extern bool edge_update_weigth(edge_t *, int);
 extern bool dump_edges(struct connection_t *);
 
 #endif /* __TINC_EDGE_H__ */