diff --git a/analytics/classes/local/indicator/community_of_inquiry_activity.php b/analytics/classes/local/indicator/community_of_inquiry_activity.php
index f7dbcfdffa2..60d5e0f8afd 100644
--- a/analytics/classes/local/indicator/community_of_inquiry_activity.php
+++ b/analytics/classes/local/indicator/community_of_inquiry_activity.php
@@ -177,7 +177,7 @@ abstract class community_of_inquiry_activity extends linear {
      */
     protected function any_feedback($action, \cm_info $cm, $contextid, $user) {
 
-        if (!in_array($action, 'submitted', 'replied', 'viewed')) {
+        if (!in_array($action, ['submitted', 'replied', 'viewed'])) {
             throw new \coding_exception('Provided action "' . $action . '" is not valid.');
         }