diff --git a/samples/client/petstore/php/models/User.php b/samples/client/petstore/php/models/User.php
index d6b520eba51..1ae88e5e2aa 100644
--- a/samples/client/petstore/php/models/User.php
+++ b/samples/client/petstore/php/models/User.php
@@ -22,7 +22,7 @@
  *
  */
 
-class User implements ArrayAccess {
+class user implements ArrayAccess {
   static $swaggerTypes = array(
       'id' => 'int',
       'username' => 'string',