diff --git a/lib/Customer.php b/lib/Customer.php
index a058624..3c3a675 100644
--- a/lib/Customer.php
+++ b/lib/Customer.php
@@ -22,7 +22,7 @@
  * --------------------------------------------------------------------------
  * Customer -> Custom actions
  * --------------------------------------------------------------------------
- * @method array search()      Search for customers matching supplied query
+ * @method array search(string $query = '')      Search for customers matching supplied query
  */
 class Customer extends ShopifyResource
 {
@@ -60,4 +60,4 @@ public function send_invite($customer_invite = array())
 
         return $this->post($dataArray, $url, false);
     }
-}
\ No newline at end of file
+}