--- channels/chan_iax2.c.orig	2009-01-06 16:46:02.000000000 -0500
+++ channels/chan_iax2.c	2009-01-19 01:36:16.000000000 -0500
@@ -8179,6 +8179,24 @@
 		}
 		if (fr->callno > 0) 
 			ast_mutex_unlock(&iaxsl[fr->callno]);
+		else {
+		        if (f.frametype == AST_FRAME_IAX && f.subclass == IAX_COMMAND_INVAL &&
+			    iaxs[dcallno]->peerpoke) {
+			        peer = iaxs[dcallno]->peerpoke;
+				if (peer->pokeexpire > -1) {
+				        if (!ast_sched_del(sched, peer->pokeexpire)) {
+					        peer->pokeexpire = -1;
+						peer_unref(peer);
+					}
+					/* Now schedule another poke */
+					peer->pokeexpire = iax2_sched_add(sched, peer->pokefreqok, iax2_poke_peer_s, peer_ref(peer));
+					if (peer->pokeexpire == -1)
+						peer_unref(peer);
+				}
+				iax2_destroy(dcallno);
+				peer->callno = 0;
+			}
+		}
 		return 1;
 	}
 	if (ast_test_flag(iaxs[fr->callno], IAX_ENCRYPTED)) {