--- res/res_pjsip_endpoint_identifier_ip.c	(Asterisk 13.21)
+++ res/res_pjsip_endpoint_identifier_ip.c	(working copy)
@@ -770,2 +770,3 @@
 	ast_sip_unregister_endpoint_formatter(&endpoint_identify_formatter);
+	ast_sip_unregister_endpoint_identifier(&header_identifier);
 	ast_sip_unregister_endpoint_identifier(&ip_identifier);