diff --git a/backup/util/dbops/restore_dbops.class.php b/backup/util/dbops/restore_dbops.class.php
index 9992713aeff..7ef9117e230 100644
--- a/backup/util/dbops/restore_dbops.class.php
+++ b/backup/util/dbops/restore_dbops.class.php
@@ -723,7 +723,7 @@ abstract class restore_dbops {
 
             // 8) Check if backup is made on Moodle >= 3.5 and there are more than one top-level category in the context.
             if ($after35 && $topcats > 1) {
-                $errors[] = get_string('restoremultipletopcats', 'questions', $contextid);
+                $errors[] = get_string('restoremultipletopcats', 'question', $contextid);
             }
 
         }