diff -r 5461fce4a2ea -r ed1a733efbc5 master/cdev.c
--- a/master/cdev.c	Fri Jul 10 10:40:05 2009 +0000
+++ b/master/cdev.c	Mon Jul 13 15:18:28 2009 +0000
@@ -1621,6 +1621,9 @@
         }
     }
 
+    ecrt_master_callbacks(master, ec_master_internal_send_cb,
+            ec_master_internal_receive_cb);
+
     ret = ecrt_master_activate(master);
     if (ret < 0)
         return ret;