diff --git a/sys/net/routing/rpl/rpl.c b/sys/net/routing/rpl/rpl.c
index 65b81913c49f..212ebddc1aaa 100644
--- a/sys/net/routing/rpl/rpl.c
+++ b/sys/net/routing/rpl/rpl.c
@@ -278,34 +278,35 @@ void *rpl_process(void *arg)
 
 void _rpl_update_routing_table(void)
 {
-    rpl_dodag_t *my_dodag = rpl_get_my_dodag();
-    rpl_routing_entry_t *rt;
+    rpl_dodag_t *my_dodag;
+    rpl_dodag_t *end;
+    rpl_routing_entry_t *rt = rpl_get_routing_table();
 
-    if (my_dodag != NULL) {
-        rt = rpl_get_routing_table();
+    for (uint8_t i = 0; i < rpl_max_routing_entries; i++) {
+        if (rt[i].used) {
+            if (rt[i].lifetime <= 1) {
+                memset(&rt[i], 0, sizeof(rt[i]));
+            }
+            else {
+                rt[i].lifetime = rt[i].lifetime - RPL_LIFETIME_STEP;
+            }
+        }
+    }
 
-        for (uint8_t i = 0; i < rpl_max_routing_entries; i++) {
-            if (rt[i].used) {
-                if (rt[i].lifetime <= 1) {
-                    memset(&rt[i], 0, sizeof(rt[i]));
+    for (my_dodag = rpl_dodags, end = my_dodag + RPL_MAX_DODAGS; my_dodag < end; my_dodag++) {
+        if (my_dodag->used) {
+            /* Parent is NULL for root too */
+            if (my_dodag->my_preferred_parent != NULL) {
+                if (my_dodag->my_preferred_parent->lifetime <= 1) {
+                    DEBUGF("parent lifetime timeout\n");
+                    rpl_parent_update(NULL);
                 }
                 else {
-                    rt[i].lifetime = rt[i].lifetime - RPL_LIFETIME_STEP;
+                    my_dodag->my_preferred_parent->lifetime =
+                        my_dodag->my_preferred_parent->lifetime - RPL_LIFETIME_STEP;
                 }
             }
         }
-
-        /* Parent is NULL for root too */
-        if (my_dodag->my_preferred_parent != NULL) {
-            if (my_dodag->my_preferred_parent->lifetime <= 1) {
-                DEBUGF("parent lifetime timeout\n");
-                rpl_parent_update(NULL);
-            }
-            else {
-                my_dodag->my_preferred_parent->lifetime =
-                    my_dodag->my_preferred_parent->lifetime - RPL_LIFETIME_STEP;
-            }
-        }
     }
 
     vtimer_remove(&rt_timer);