diff --git a/core/net/rime/collect.c b/core/net/rime/collect.c
index f0a57a07b..0c8e9273e 100644
--- a/core/net/rime/collect.c
+++ b/core/net/rime/collect.c
@@ -33,7 +33,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: collect.c,v 1.35 2010/02/28 14:15:58 adamdunkels Exp $
+ * $Id: collect.c,v 1.36 2010/03/02 15:41:23 dak664 Exp $
  */
 
 /**
@@ -619,7 +619,7 @@ collect_open(struct collect_conn *tc, uint16_t channels,
   neighbor_discovery_open(&tc->neighbor_discovery_conn, channels,
 			  CLOCK_SECOND * 8,
 			  CLOCK_SECOND * 32,
-			  CLOCK_SECOND * 600,
+			  (unsigned) (CLOCK_SECOND * 600UL),
 			  &neighbor_discovery_callbacks);
   neighbor_discovery_start(&tc->neighbor_discovery_conn, tc->rtmetric);
 #else /* !COLLECT_ANNOUNCEMENTS */
diff --git a/core/net/rime/neighbor-discovery.c b/core/net/rime/neighbor-discovery.c
index 7d7b9d726..f2c6efcf9 100644
--- a/core/net/rime/neighbor-discovery.c
+++ b/core/net/rime/neighbor-discovery.c
@@ -33,7 +33,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: neighbor-discovery.c,v 1.16 2010/02/23 18:36:50 adamdunkels Exp $
+ * $Id: neighbor-discovery.c,v 1.17 2010/03/02 15:41:23 dak664 Exp $
  */
 
 /**
@@ -148,7 +148,7 @@ send_timer(void *ptr)
 
   c->current_interval = interval;
 
-  printf("current_interval %lu\n", interval);
+  printf("current_interval %lu\n", (long unsigned int) interval);
   set_timers(c);
 }
 /*---------------------------------------------------------------------------*/