diff --git a/lib/grade/grade_object.php b/lib/grade/grade_object.php
index 56e061592e6..08859f56d81 100644
--- a/lib/grade/grade_object.php
+++ b/lib/grade/grade_object.php
@@ -195,10 +195,10 @@ abstract class grade_object {
         foreach($rs as $data) {
             $instance = new $classname();
             grade_object::set_properties($instance, $data);
-            $result[$instance->id] = $instance;	
+            $result[$instance->id] = $instance;
         }
         $rs->close();
-        
+
         return $result;
     }