diff --git a/code/GridFieldBulkManager_Request.php b/code/GridFieldBulkManager_Request.php
index 6ddef82..2be85b1 100644
--- a/code/GridFieldBulkManager_Request.php
+++ b/code/GridFieldBulkManager_Request.php
@@ -28,7 +28,7 @@ class GridFieldBulkManager_Request extends RequestHandler {
 	/**
 	 *
 	 */
-	static $url_handlers = array(
+	private static $url_handlers = array(
 		'$Action!' => '$Action'
 	);