diff --git a/completion/criteria/completion_criteria_activity.php b/completion/criteria/completion_criteria_activity.php
index 29c570b5f95..592c84e8a57 100644
--- a/completion/criteria/completion_criteria_activity.php
+++ b/completion/criteria/completion_criteria_activity.php
@@ -279,7 +279,8 @@ class completion_criteria_activity extends completion_criteria {
             $details['requirement'][] = get_string('markingyourselfcomplete', 'completion');
         } elseif ($cm->completion == COMPLETION_TRACKING_AUTOMATIC) {
             if ($cm->completionview) {
-                $details['requirement'][] = get_string('viewingactivity', 'completion', $this->module);
+                $modulename = core_text::strtolower(get_string('modulename', $this->module));
+                $details['requirement'][] = get_string('viewingactivity', 'completion', $modulename);
             }
 
             if (!is_null($cm->completiongradeitemnumber)) {