diff --git a/channels/chan_pjsip.c b/channels/chan_pjsip.c
index 7520c2b0ec99c8167ff923de960e6ac7c325902c..0160425e62ca855e41e0f9c60cd2ee6a0cb23906 100644
--- a/channels/chan_pjsip.c
+++ b/channels/chan_pjsip.c
@@ -2442,6 +2442,8 @@ static struct ast_channel *chan_pjsip_request_with_stream_topology(const char *t
 
 	req_data.topology = topology;
 	req_data.dest = data;
+	/* Default failure value in case ast_sip_push_task_synchronous() itself fails. */
+	req_data.cause = AST_CAUSE_FAILURE;
 
 	if (ast_sip_push_task_synchronous(NULL, request, &req_data)) {
 		*cause = req_data.cause;