diff -r b56cc0ab90e2 -r bab07ecb9330 libpurple/protocols/jabber/jabber.c
--- a/libpurple/protocols/jabber/jabber.c	Thu Jun 20 22:40:23 2019 -0500
+++ b/libpurple/protocols/jabber/jabber.c	Tue Jul 02 03:07:40 2019 -0500
@@ -4279,6 +4279,8 @@
 	gtalk_protocol_register_type(plugin);
 	xmpp_protocol_register_type(plugin);
 
+	jabber_si_xfer_register(G_TYPE_MODULE(plugin));
+
 	xmpp_protocol = purple_protocols_add(XMPP_TYPE_PROTOCOL, error);
 	if (!xmpp_protocol)
 		return FALSE;