diff --git a/modules/ggroup/src/GroupHierarchyManager.php b/modules/ggroup/src/GroupHierarchyManager.php
index 8708b53..95d6cd7 100644
--- a/modules/ggroup/src/GroupHierarchyManager.php
+++ b/modules/ggroup/src/GroupHierarchyManager.php
@@ -193,7 +193,7 @@ class GroupHierarchyManager implements GroupHierarchyManagerInterface {
         continue;
       }
 
-      $mapped_role_ids[] = array_intersect_key($role_map[$group_id][$membership_gid], array_flip($this->getMembershipRoles($membership)));
+      $mapped_role_ids[] = array_flip(array_intersect_key(array_flip($role_map[$group_id][$membership_gid]), array_flip($this->getMembershipRoles($membership))));
     }
     $mapped_role_ids = array_replace_recursive(...$mapped_role_ids);