diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 7f22b96c8c..927f0aeaec 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -2512,7 +2512,7 @@ static void sip_threadinfo_destructor(void *obj)
 	struct sip_threadinfo *th = obj;
 	struct tcptls_packet *packet;
 
-	if (th->alert_pipe[1] > -1) {
+	if (th->alert_pipe[0] > -1) {
 		close(th->alert_pipe[0]);
 	}
 	if (th->alert_pipe[1] > -1) {