diff --git a/src/Worker/Controller.php b/src/Worker/Controller.php
index 161862a..4f22b50 100644
--- a/src/Worker/Controller.php
+++ b/src/Worker/Controller.php
@@ -64,7 +64,7 @@ public function bindActionParams($action, $params) {
             /* @var $param \ReflectionParameter */
             $name = $param->getName();
             if (isset($params[$name])) {
-                if ($param->isArray()) {
+                if ($param->isArray() && !is_array($params[$name])) {
                     $args[] = preg_split('/\s*,\s*/', $params[$name]);
                 } else {
                     $args[] = $params[$name];