Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 113646)
+++ channels/chan_sip.c	(working copy)
@@ -12351,6 +12351,7 @@
 			if (p->owner && !ast_test_flag(req, SIP_PKT_IGNORE))
 				ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
 			ast_set_flag(&p->flags[0], SIP_NEEDDESTROY);	
+			sip_alreadygone(p);
 		}
 		break;
 	case 491: /* Pending */