diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index ad3b7b3a412170ca66eacff741eab05bfd45691e..87c665fb7dcc65f6427f8d7a96cfdcd032caf504 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -5815,11 +5815,9 @@ static int auth_fail(int callno, int failcode)
 	if (iaxs[callno]) {
 		iaxs[callno]->authfail = failcode;
 		if (delayreject) {
-			ast_mutex_lock(&iaxsl[callno]);
 			if (iaxs[callno]->authid > -1)
 				ast_sched_del(sched, iaxs[callno]->authid);
 			iaxs[callno]->authid = ast_sched_add(sched, 1000, auth_reject, (void *)(long)callno);
-			ast_mutex_unlock(&iaxsl[callno]);
 		} else
 			auth_reject((void *)(long)callno);
 	}