1 files changed, 5 insertions, 4 deletions

diff --git a/lib/smarty3/sysplugins/smarty_internal_method_unregisterfilter.php b/lib/smarty3/sysplugins/smarty_internal_method_unregisterfilter.php
index ec69c55..9cb494a 100644
--- a/lib/smarty3/sysplugins/smarty_internal_method_unregisterfilter.php
+++ b/lib/smarty3/sysplugins/smarty_internal_method_unregisterfilter.php
@@ -19,14 +19,15 @@ class Smarty_Internal_Method_UnregisterFilter extends Smarty_Internal_Method_Reg
      * @link http://www.smarty.net/docs/en/api.unregister.filter.tpl
      *
      * @param \Smarty_Internal_TemplateBase|\Smarty_Internal_Template|\Smarty $obj
-     * @param  string                                                         $type filter type
-     * @param  callback|string                                                $callback
+     * @param string                                                          $type filter type
+     * @param callback|string                                                 $callback
      *
      * @return \Smarty|\Smarty_Internal_Template
+     * @throws \SmartyException
      */
     public function unregisterFilter(Smarty_Internal_TemplateBase $obj, $type, $callback)
     {
-        $smarty = isset($obj->smarty) ? $obj->smarty : $obj;
+        $smarty = $obj->_getSmartyObj();
         $this->_checkFilterType($type);
         if (isset($smarty->registered_filters[ $type ])) {
             $name = is_string($callback) ? $callback : $this->_getFilterName($callback);
@@ -39,4 +40,4 @@ class Smarty_Internal_Method_UnregisterFilter extends Smarty_Internal_Method_Reg
         }
         return $obj;
     }
-}
\ No newline at end of file
+}