diff --git a/os/services/rpl-border-router/native/slip-dev.c b/os/services/rpl-border-router/native/slip-dev.c
index 7ea7648360af276da0808cde2772dd8d85942438..3ccd1db4b28f9ceb76f931d5bdd4ead91ab781c8 100644
--- a/os/services/rpl-border-router/native/slip-dev.c
+++ b/os/services/rpl-border-router/native/slip-dev.c
@@ -562,7 +562,7 @@ slip_init(void)
   slip_send(slipfd, SLIP_END);
   inslip = fdopen(slipfd, "r");
   if(inslip == NULL) {
-    err(1, "main: fdopen");
+    err(1, "slip_init: fdopen");
   }
 }
 /*---------------------------------------------------------------------------*/
diff --git a/os/services/rpl-border-router/native/tun-bridge.c b/os/services/rpl-border-router/native/tun-bridge.c
index f321577b30bbf93e91d6a9b44ad3cba3c040cc91..289a32185d4dd8eb0f5605251d0e7fd0972cce69 100644
--- a/os/services/rpl-border-router/native/tun-bridge.c
+++ b/os/services/rpl-border-router/native/tun-bridge.c
@@ -210,7 +210,7 @@ tun_init()
   tunfd = tun_alloc(slip_config_tundev);
 
   if(tunfd == -1) {
-    err(1, "main: open");
+    err(1, "tun_init: open");
   }
 
   select_set_callback(tunfd, &tun_select_callback);