diff --git a/src/graph.c b/src/graph.c
index 02650f73..95894772 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -376,7 +376,7 @@ void graph(void)
 	sssp_bfs();
 	mst_kruskal();
 
-	if(!ev.ev_callback)
+	if(!timeout_initialized(&ev))
 		timeout_set(&ev, dump_graph, NULL);
 	event_add(&ev, &(struct timeval){5, 0});
 }
diff --git a/src/net_packet.c b/src/net_packet.c
index 57794f98..84b2707d 100644
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -98,7 +98,7 @@ static void send_mtu_probe_handler(int fd, short events, void *data) {
 }
 
 void send_mtu_probe(node_t *n) {
-	if(!n->mtuevent.ev_callback)
+	if(!timeout_initialized(&n->mtuevent))
 		timeout_set(&n->mtuevent, send_mtu_probe_handler, n);
 	send_mtu_probe_handler(0, 0, n);
 }