diff --git a/plugins/sip/calls-sip-origin.c b/plugins/sip/calls-sip-origin.c
index 243b99b..6906295 100644
--- a/plugins/sip/calls-sip-origin.c
+++ b/plugins/sip/calls-sip-origin.c
@@ -1356,6 +1356,11 @@ calls_sip_origin_dispose (GObject *object)
   CallsSipOrigin *self = CALLS_SIP_ORIGIN (object);
 
   g_clear_pointer (&self->own_ip, g_free);
+  g_clear_pointer (&self->transport_protocol, g_free);
+  g_clear_pointer (&self->display_name, g_free);
+  g_clear_pointer (&self->host, g_free);
+  g_clear_pointer (&self->user, g_free);
+  g_clear_pointer (&self->password, g_free);
 
   if (!self->use_direct_connection && self->state == CALLS_ACCOUNT_STATE_ONLINE)
     go_online (CALLS_ACCOUNT (self), FALSE);