Index: channels/chan_zap.c
===================================================================
--- channels/chan_zap.c	(revision 103664)
+++ channels/chan_zap.c	(working copy)
@@ -2108,8 +2108,11 @@
 		}
 		if (!(sr = pri_sr_new())) {
 			ast_log(LOG_WARNING, "Failed to allocate setup request channel %d\n", p->channel);
+			pri_destroycall(p->pri->pri, p->call);
+			p->call = NULL;
 			pri_rel(p->pri);
 			ast_mutex_unlock(&p->lock);
+			return -1;
 		}
 		if (p->bearer || (mysig == SIG_FXSKS)) {
 			if (p->bearer) {