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-rw-r--r--channels/chan_pjsip.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/channels/chan_pjsip.c b/channels/chan_pjsip.c
index 96500b4ed..42e329e50 100644
--- a/channels/chan_pjsip.c
+++ b/channels/chan_pjsip.c
@@ -2122,6 +2122,7 @@ static int unload_module(void)
ast_sip_session_unregister_supplement(&chan_pjsip_supplement);
ast_sip_session_unregister_supplement(&pbx_start_supplement);
+ ast_sip_session_unregister_supplement(&chan_pjsip_ack_supplement);
ast_custom_function_unregister(&chan_pjsip_dial_contacts_function);
ast_channel_unregister(&chan_pjsip_tech);