--- loncom/interface/lonexttool.pm	2017/12/07 15:36:34	1.9
+++ loncom/interface/lonexttool.pm	2017/12/07 16:06:04	1.10
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Launch External Tool Provider (LTI)
 #
-# $Id: lonexttool.pm,v 1.9 2017/12/07 15:36:34 raeburn Exp $
+# $Id: lonexttool.pm,v 1.10 2017/12/07 16:06:04 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -275,7 +275,7 @@ sub lti_params {
                 $ltiparams{'ext_ims_lis_basic_outcome_url'} = $ltiparams{'lis_outcome_service_url'};
                 if ($gradesecret) {
                     my $uniqid = $digest_symb.':::'.$digest_user.':::'.$env{'request.course.id'};
-                    $ltiparams{'lis_result_sourcedid'} = &LONCAPA::ltiutils::get_unique_callback($gradesecret,$uniqid); 
+                    $ltiparams{'lis_result_sourcedid'} = &LONCAPA::ltiutils::get_service_id($gradesecret,$uniqid); 
                 }
             }
             if ($roster) {
@@ -283,7 +283,7 @@ sub lti_params {
                     $ltiparams{'ext_ims_lis_memberships_url'} = $crsprotocol.'://'.$crshostname.'/adm/service/roster';
                     if ($rostersecret) {
                         my $uniqid = $digest_symb.':::'.$env{'request.course.id'};
-                        $ltiparams{'ext_ims_lis_memberships_id'} = &LONCAPA::ltiutils::get_unique_callback($rostersecret,$uniqid);
+                        $ltiparams{'ext_ims_lis_memberships_id'} = &LONCAPA::ltiutils::get_service_id($rostersecret,$uniqid);
                     }
                 }
             }