diff --git a/core/net/rpl/rpl-dag.c b/core/net/rpl/rpl-dag.c
index a534a7c92..a0f01caaf 100644
--- a/core/net/rpl/rpl-dag.c
+++ b/core/net/rpl/rpl-dag.c
@@ -1441,8 +1441,6 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
     PRINTF("RPL: Ignoring DIO with too low rank: %u\n",
            (unsigned)dio->rank);
     return;
-  } else if(dio->rank == INFINITE_RANK && dag->joined) {
-    rpl_reset_dio_timer(instance);
   }
 
   /* Prefix Information Option treated to add new prefix */
@@ -1509,6 +1507,11 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
   }
   p->rank = dio->rank;
 
+  if(dio->rank == INFINITE_RANK && p == dag->preferred_parent) {
+    /* Our preferred parent advertised an infinite rank, reset DIO timer */
+    rpl_reset_dio_timer(instance);
+  }
+
   /* Parent info has been updated, trigger rank recalculation */
   p->flags |= RPL_PARENT_FLAG_UPDATED;