diff --git a/blocks/completionstatus/details.php b/blocks/completionstatus/details.php
index e1fdda0700c..38d89b34a57 100644
--- a/blocks/completionstatus/details.php
+++ b/blocks/completionstatus/details.php
@@ -133,7 +133,7 @@ if (empty($completions)) {
     echo html_writer::start_tag('tr');
     echo html_writer::start_tag('td', array('colspan' => '2'));
     echo html_writer::start_tag('br');
-    echo $OUTPUT->box(get_string('err_nocriteria', 'completion'), 'noticebox');
+    echo $OUTPUT->box(get_string('nocriteriaset', 'completion'), 'noticebox');
     echo html_writer::end_tag('td');
     echo html_writer::end_tag('tr');
     echo html_writer::end_tag('tbody');
diff --git a/completion/classes/external.php b/completion/classes/external.php
index 168d34d8bcc..d464901ca3c 100644
--- a/completion/classes/external.php
+++ b/completion/classes/external.php
@@ -301,7 +301,7 @@ class core_completion_external extends external_api {
 
         $completions = $info->get_completions($user->id);
         if (empty($completions)) {
-            throw new moodle_exception('err_nocriteria', 'completion');
+            throw new moodle_exception('nocriteriaset', 'completion');
         }
 
         // Load course completion.
diff --git a/report/completion/index.php b/report/completion/index.php
index 5f84c266952..984a5bad542 100644
--- a/report/completion/index.php
+++ b/report/completion/index.php
@@ -91,7 +91,7 @@ $modinfo = get_fast_modinfo($course);
 $completion = new completion_info($course);
 
 if (!$completion->has_criteria()) {
-    print_error('err_nocriteria', 'completion', $CFG->wwwroot.'/course/report.php?id='.$course->id);
+    print_error('nocriteriaset', 'completion', $CFG->wwwroot.'/course/report.php?id='.$course->id);
 }
 
 // Get criteria and put in correct order