Index: channels/chan_zap.c
===================================================================
--- channels/chan_zap.c	(revision 7849)
+++ channels/chan_zap.c	(working copy)
@@ -5973,10 +5973,12 @@ lax);
 							ast_log(LOG_NOTICE, "Got event %d (%s)...\n", res, event2str(res));
 
 							if (p->cid_signalling == CID_SIG_V23_JP) {
+#ifdef ZT_EVENT_RINGBEGIN
 								if (res == ZT_EVENT_RINGBEGIN) {
 									res = zt_set_hook(p->subs[SUB_REAL].zfd, ZT_OFFHOOK);
             								usleep(1);
 								}
+#endif
 							} else {
 								res = 0;
 								break;