Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 336374)
+++ channels/chan_sip.c	(working copy)
@@ -25066,6 +25066,7 @@
 			dialog_unlink_all(p, TRUE, TRUE);
 			dialog_unref(p, "unref dialog p just created via sip_alloc");
 			/* sip_destroy(p); */
+			ao2_unlock(peer);
 			return -1;
 		}
 		/* Recalculate our side, and recalculate Call ID */