diff -r 69dad4ec73c2 -r 6693d7e25d5e master/device.c
--- a/master/device.c	Tue Feb 14 14:53:41 2006 +0000
+++ b/master/device.c	Mon Feb 20 08:30:30 2006 +0000
@@ -347,7 +347,7 @@
 
 int EtherCAT_dev_is_ec(ec_device_t *ecd, struct net_device *dev)
 {
-  return ecd->dev == dev;
+  return ecd && ecd->dev == dev;
 }
 
 /*****************************************************************************/