diff --git a/change_log.txt b/change_log.txt
index 6ac13400..2c478764 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -3,6 +3,7 @@
   - optimization  of template/config file normalization
   - optimization  of directory handling / build realpath
   - optimization  of filter execution
+  - move  registerObject / registerClass into extension
 
  19.06.2015
   - improvement allow closures as callback at $smarty->registerFilter() https://github.com/smarty-php/smarty/issues/59
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index b49e307e..dd6c5ac8 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -111,7 +111,7 @@ class Smarty extends Smarty_Internal_TemplateBase
     /**
      * smarty version
      */
-    const SMARTY_VERSION = '3.1.28-dev/4';
+    const SMARTY_VERSION = '3.1.28-dev/5';
 
     /**
      * define variable scopes
diff --git a/libs/sysplugins/smarty_internal_extension_object.php b/libs/sysplugins/smarty_internal_extension_object.php
new file mode 100644
index 00000000..05fc35a6
--- /dev/null
+++ b/libs/sysplugins/smarty_internal_extension_object.php
@@ -0,0 +1,110 @@
+<?php
+
+/**
+ * Smarty Extension Object
+ *
+ * Register object methods
+ *
+ * @package    Smarty
+ * @subpackage PluginsInternal
+ * @author     Uwe Tews
+ */
+class Smarty_Internal_Extension_Object
+{
+    /**
+     * Registers object to be used in templates
+     *
+     * @param  \Smarty_Internal_Template|\Smarty $obj
+     * @param  string                            $object_name
+     * @param  object                            $object_impl   the referenced PHP object to register
+     * @param  array                             $allowed       list of allowed methods (empty = all)
+     * @param  boolean                           $smarty_args   smarty argument format, else traditional
+     * @param  array                             $block_methods list of block-methods
+     *
+     * @return \Smarty_Internal_Templatebase
+     * @throws \SmartyException
+     */
+    static function registerObject($obj, $object_name, $object_impl, $allowed = array(), $smarty_args = true, $block_methods = array())
+    {
+        // test if allowed methods callable
+        if (!empty($allowed)) {
+            foreach ((array) $allowed as $method) {
+                if (!is_callable(array($object_impl, $method)) && !property_exists($object_impl, $method)) {
+                    throw new SmartyException("Undefined method or property '$method' in registered object");
+                }
+            }
+        }
+        // test if block methods callable
+        if (!empty($block_methods)) {
+            foreach ((array) $block_methods as $method) {
+                if (!is_callable(array($object_impl, $method))) {
+                    throw new SmartyException("Undefined method '$method' in registered object");
+                }
+            }
+        }
+        // register the object
+        $smarty = isset($obj->smarty) ? $obj->smarty : $obj;
+        $smarty->registered_objects[$object_name] = array($object_impl, (array) $allowed, (boolean) $smarty_args,
+            (array) $block_methods);
+    }
+
+    /**
+     * return a reference to a registered object
+     *
+     * @param  \Smarty_Internal_Template|\Smarty $obj
+     * @param  string                            $name object name
+     *
+     * @return object
+     * @throws \SmartyException if no such object is found
+     */
+    static function getRegisteredObject($obj, $name)
+    {
+        $smarty = isset($obj->smarty) ? $obj->smarty : $obj;
+        if (!isset($smarty->registered_objects[$name])) {
+            throw new SmartyException("'$name' is not a registered object");
+        }
+        if (!is_object($smarty->registered_objects[$name][0])) {
+            throw new SmartyException("registered '$name' is not an object");
+        }
+        return $smarty->registered_objects[$name][0];
+    }
+
+    /**
+     * unregister an object
+     *
+     * @param  \Smarty_Internal_Template|\Smarty $obj
+     * @param  string                            $name object name
+     *
+     * @return \Smarty_Internal_Templatebase current Smarty_Internal_Templatebase (or Smarty or
+     *                                      Smarty_Internal_Template) instance for chaining
+     */
+    static function unregisterObject($obj, $name)
+    {
+        $smarty = isset($obj->smarty) ? $obj->smarty : $obj;
+        if (isset($smarty->registered_objects[$name])) {
+            unset($smarty->registered_objects[$name]);
+        }
+    }
+
+    /**
+     * Registers static classes to be used in templates
+     *
+     * @param  \Smarty_Internal_Template|\Smarty $obj
+     * @param  string                            $class_name
+     * @param  string                            $class_impl the referenced PHP class to register
+     *
+     * @return \Smarty_Internal_Templatebase
+     * @throws \SmartyException
+     */
+    static function registerClass($obj, $class_name, $class_impl)
+    {
+        // test if exists
+        if (!class_exists($class_impl)) {
+            throw new SmartyException("Undefined class '$class_impl' in register template class");
+        }
+        // register the class
+        $smarty = isset($obj->smarty) ? $obj->smarty : $obj;
+        $smarty->registered_classes[$class_name] = $class_impl;
+    }
+
+}
\ No newline at end of file
diff --git a/libs/sysplugins/smarty_internal_templatebase.php b/libs/sysplugins/smarty_internal_templatebase.php
index 8fab99be..f5238b2b 100644
--- a/libs/sysplugins/smarty_internal_templatebase.php
+++ b/libs/sysplugins/smarty_internal_templatebase.php
@@ -50,9 +50,9 @@ abstract class Smarty_Internal_TemplateBase extends Smarty_Internal_Data
      * test if cache is valid
      *
      * @param  string|\Smarty_Internal_Template $template   the resource handle of the template file or template object
-     * @param  mixed         $cache_id   cache id to be used with this template
-     * @param  mixed         $compile_id compile id to be used with this template
-     * @param  object        $parent     next higher level of Smarty variables
+     * @param  mixed                            $cache_id   cache id to be used with this template
+     * @param  mixed                            $compile_id compile id to be used with this template
+     * @param  object                           $parent     next higher level of Smarty variables
      *
      * @return boolean       cache status
      */
@@ -251,27 +251,7 @@ abstract class Smarty_Internal_TemplateBase extends Smarty_Internal_Data
      */
     public function registerObject($object_name, $object_impl, $allowed = array(), $smarty_args = true, $block_methods = array())
     {
-        // test if allowed methods callable
-        if (!empty($allowed)) {
-            foreach ((array) $allowed as $method) {
-                if (!is_callable(array($object_impl, $method)) && !property_exists($object_impl, $method)) {
-                    throw new SmartyException("Undefined method or property '$method' in registered object");
-                }
-            }
-        }
-        // test if block methods callable
-        if (!empty($block_methods)) {
-            foreach ((array) $block_methods as $method) {
-                if (!is_callable(array($object_impl, $method))) {
-                    throw new SmartyException("Undefined method '$method' in registered object");
-                }
-            }
-        }
-        // register the object
-        $smarty = isset($this->smarty) ? $this->smarty : $this;
-        $smarty->registered_objects[$object_name] = array($object_impl, (array) $allowed, (boolean) $smarty_args,
-            (array) $block_methods);
-
+        Smarty_Internal_Extension_Object::registerObject($this, $object_name, $object_impl, $allowed, $smarty_args, $block_methods);
         return $this;
     }
 
@@ -285,15 +265,7 @@ abstract class Smarty_Internal_TemplateBase extends Smarty_Internal_Data
      */
     public function getRegisteredObject($name)
     {
-        $smarty = isset($this->smarty) ? $this->smarty : $this;
-        if (!isset($smarty->registered_objects[$name])) {
-            throw new SmartyException("'$name' is not a registered object");
-        }
-        if (!is_object($smarty->registered_objects[$name][0])) {
-            throw new SmartyException("registered '$name' is not an object");
-        }
-
-        return $smarty->registered_objects[$name][0];
+        return Smarty_Internal_Extension_Object::getRegisteredObject($this, $name);
     }
 
     /**
@@ -306,11 +278,7 @@ abstract class Smarty_Internal_TemplateBase extends Smarty_Internal_Data
      */
     public function unregisterObject($name)
     {
-        $smarty = isset($this->smarty) ? $this->smarty : $this;
-        if (isset($smarty->registered_objects[$name])) {
-            unset($smarty->registered_objects[$name]);
-        }
-
+        Smarty_Internal_Extension_Object::unregisterObject($this, $name);
         return $this;
     }
 
@@ -326,14 +294,7 @@ abstract class Smarty_Internal_TemplateBase extends Smarty_Internal_Data
      */
     public function registerClass($class_name, $class_impl)
     {
-        // test if exists
-        if (!class_exists($class_impl)) {
-            throw new SmartyException("Undefined class '$class_impl' in register template class");
-        }
-        // register the class
-        $smarty = isset($this->smarty) ? $this->smarty : $this;
-        $smarty->registered_classes[$class_name] = $class_impl;
-
+        Smarty_Internal_Extension_Object::registerClass($this, $class_name, $class_impl);
         return $this;
     }