diff --git a/core/net/rime/collect-neighbor.c b/core/net/rime/collect-neighbor.c
index 06d61a284..7e91ce855 100644
--- a/core/net/rime/collect-neighbor.c
+++ b/core/net/rime/collect-neighbor.c
@@ -33,7 +33,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: collect-neighbor.c,v 1.8 2010/10/11 23:38:46 adamdunkels Exp $
+ * $Id: collect-neighbor.c,v 1.9 2011/01/09 21:20:05 adamdunkels Exp $
  */
 
 /**
@@ -63,7 +63,7 @@
 
 MEMB(collect_neighbors_mem, struct collect_neighbor, MAX_COLLECT_NEIGHBORS);
 
-#define MAX_AGE                      60
+#define MAX_AGE                      180
 #define MAX_LE_AGE                   10
 #define PERIODIC_INTERVAL            CLOCK_SECOND * 60
 
@@ -98,6 +98,7 @@ periodic(void *ptr)
       n->le_age = 0;
     }
     if(n->age == MAX_AGE) {
+      memb_free(&collect_neighbors_mem, n);
       list_remove(neighbor_list->list, n);
       n = list_head(neighbor_list->list);
     }