FS-5550 --resolve

src/mod/endpoints/mod_loopback/mod_loopback.c

@@ -24,6 +24,7 @@
  * Contributor(s):
  * 
  * Anthony Minessale II <anthm@freeswitch.org>
+ * Emmanuel Schmidbauer <e.schmidbauer@gmail.com>
  *
  *
  * mod_loopback.c -- Loopback Endpoint Module
@@ -534,6 +535,7 @@ static switch_status_t channel_on_hangup(switch_core_session_t *session)
 
 	channel = switch_core_session_get_channel(session);
 	switch_assert(channel != NULL);
+	switch_channel_set_variable(channel, "is_loopback", "1");
 
 	tech_pvt = switch_core_session_get_private(session);
 	switch_assert(tech_pvt != NULL);