diff --git a/src/LaravelController.php b/src/LaravelController.php
index 8b355b2..e4cab1c 100644
--- a/src/LaravelController.php
+++ b/src/LaravelController.php
@@ -125,9 +125,9 @@ protected function parseFilterGroups(array $filter_groups)
             $or = false;
             if (array_key_exists('or', $group)) {
                 if ($group['or'] === 'true') {
-                    $group['or'] = true;
+                    $or = true;
                 } else if ($group['or'] === 'false') {
-                    $group['or'] = false;
+                    $or = false;
                 }
             }