diff --git a/src/Lock.php b/src/Lock.php
index b12cd75..0d70dbe 100644
--- a/src/Lock.php
+++ b/src/Lock.php
@@ -306,6 +306,7 @@ public function denied($actions, $resourceType)
             $denied[$action] = [];
             $allowedOnCallerLevel[$action] = [];
             $deniedOnCallerLevel[$action] = [];
+            $allowedOnRoleLevel[$action] = [];
             $deniedOnRoleLevel[$action] = [];
 
             // browse permission of a role / caller