diff -ur pptp-1.7.2/pptp_ctrl.c pptp-1.7.2-cisco/pptp_ctrl.c
--- pptp-1.7.2/pptp_ctrl.c	2008-05-14 18:33:55.000000000 +1200
+++ pptp-1.7.2-cisco/pptp_ctrl.c	2010-08-25 17:04:42.000000000 +1200
@@ -338,7 +338,7 @@
     assert(conn && conn->call);
     assert(conn->conn_state == CONN_ESTABLISHED);
     /* Assign call id */
-    if (!vector_scan(conn->call, 0, PPTP_MAX_CHANNELS - 1, &i))
+    if (!vector_scan(conn->call, 1, PPTP_MAX_CHANNELS - 1, &i))
         /* no more calls available! */
         return NULL;
     /* allocate structure. */