diff --git a/src/SilverStripe/InvalidationExtension.php b/src/SilverStripe/InvalidationExtension.php
index dca50bf..ccbd7d7 100644
--- a/src/SilverStripe/InvalidationExtension.php
+++ b/src/SilverStripe/InvalidationExtension.php
@@ -59,6 +59,14 @@ public function onAfterWrite()
         $this->onChange('write');
     }
 
+    /**
+     * @return void
+     */
+    public function onAfterReorder()
+    {
+        $this->onChange('reorder');
+    }
+
     /**
      * @return void
      */