--- upstream/dynamips-0.2.5/dev_c3600_serial.c	2007/10/06 16:01:44	1
+++ upstream/dynamips-0.2.6-RC1/dev_c3600_serial.c	2007/10/06 16:03:58	2
@@ -113,4 +113,5 @@
    dev_c3600_nm_4t_shutdown,
    dev_c3600_nm_4t_set_nio,
    dev_c3600_nm_4t_unset_nio,
+   NULL,
 };