diff -urNb mpd-3.18/src/pptp_ctrl.c mpd-3.18.patched/src/pptp_ctrl.c
--- mpd-3.18/src/pptp_ctrl.c	Tue May  4 22:12:28 2004
+++ mpd-3.18.patched/src/pptp_ctrl.c	Sat Sep 24 19:10:05 2005
@@ -1373,6 +1373,9 @@
     case PPTP_CHAN_ST_WAIT_CTRL:
       PptpCtrlKillChan(ch, "link layer shutdown");
       return;
+    case PPTP_CHAN_ST_FREE:
+      Log(LG_PPTP, ("pptp%d-%d: PptpCtrlCloseChan() is called recursively, ignoring", c->id, ch->id));
+      return;
     default:
       assert(0);
   }