diff --git a/change_log.txt b/change_log.txt
index 280d7970..3db75cab 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -5,6 +5,7 @@
   - move auto load filter methods into extension
   - move $smarty->getTemplateVars() into extension
   - move getStreamVariable() into extension
+  - move $smarty->append() and $smarty->appendByRef() into extension
 
  27.06.2015
   - bugfix resolve naming conflict between custom Smarty delimiter '<%' and PHP ASP tags https://github.com/smarty-php/smarty/issues/64
diff --git a/libs/Autoloader.php b/libs/Autoloader.php
index 503c8832..21a9a6bb 100644
--- a/libs/Autoloader.php
+++ b/libs/Autoloader.php
@@ -82,6 +82,7 @@ class Smarty_Autoloader
                                               'smarty_internal_extension_loadplugin'     => true,
                                               'smarty_internal_extension_clearcompiled'  => true,
                                               'smarty_internal_extension_getvars'        => true,
+                                              'smarty_internal_extension_append'         => true,
                                               'smarty_internal_filter_handler'           => true,
                                               'smarty_internal_function_call_handler'    => true,
                                               'smarty_internal_cacheresource_file'       => true,
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index e4ea1483..11fd8ae2 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/15';
+    const SMARTY_VERSION = '3.1.28-dev/16';
 
     /**
      * define variable scopes
diff --git a/libs/sysplugins/smarty_internal_data.php b/libs/sysplugins/smarty_internal_data.php
index 5ea03577..f7efa82d 100644
--- a/libs/sysplugins/smarty_internal_data.php
+++ b/libs/sysplugins/smarty_internal_data.php
@@ -121,53 +121,7 @@ class Smarty_Internal_Data
      */
     public function append($tpl_var, $value = null, $merge = false, $nocache = false)
     {
-        if (is_array($tpl_var)) {
-            // $tpl_var is an array, ignore $value
-            foreach ($tpl_var as $_key => $_val) {
-                if ($_key != '') {
-                    if (!isset($this->tpl_vars[$_key])) {
-                        $tpl_var_inst = $this->getVariable($_key, null, true, false);
-                        if ($tpl_var_inst instanceof Smarty_Undefined_Variable) {
-                            $this->tpl_vars[$_key] = new Smarty_Variable(null, $nocache);
-                        } else {
-                            $this->tpl_vars[$_key] = clone $tpl_var_inst;
-                        }
-                    }
-                    if (!(is_array($this->tpl_vars[$_key]->value) || $this->tpl_vars[$_key]->value instanceof ArrayAccess)) {
-                        settype($this->tpl_vars[$_key]->value, 'array');
-                    }
-                    if ($merge && is_array($_val)) {
-                        foreach ($_val as $_mkey => $_mval) {
-                            $this->tpl_vars[$_key]->value[$_mkey] = $_mval;
-                        }
-                    } else {
-                        $this->tpl_vars[$_key]->value[] = $_val;
-                    }
-                }
-            }
-        } else {
-            if ($tpl_var != '' && isset($value)) {
-                if (!isset($this->tpl_vars[$tpl_var])) {
-                    $tpl_var_inst = $this->getVariable($tpl_var, null, true, false);
-                    if ($tpl_var_inst instanceof Smarty_Undefined_Variable) {
-                        $this->tpl_vars[$tpl_var] = new Smarty_Variable(null, $nocache);
-                    } else {
-                        $this->tpl_vars[$tpl_var] = clone $tpl_var_inst;
-                    }
-                }
-                if (!(is_array($this->tpl_vars[$tpl_var]->value) || $this->tpl_vars[$tpl_var]->value instanceof ArrayAccess)) {
-                    settype($this->tpl_vars[$tpl_var]->value, 'array');
-                }
-                if ($merge && is_array($value)) {
-                    foreach ($value as $_mkey => $_mval) {
-                        $this->tpl_vars[$tpl_var]->value[$_mkey] = $_mval;
-                    }
-                } else {
-                    $this->tpl_vars[$tpl_var]->value[] = $value;
-                }
-            }
-        }
-
+        Smarty_Internal_Extension_Append::append($this, $tpl_var, $value, $merge, $nocache);
         return $this;
     }
 
@@ -182,22 +136,7 @@ class Smarty_Internal_Data
      */
     public function appendByRef($tpl_var, &$value, $merge = false)
     {
-        if ($tpl_var != '' && isset($value)) {
-            if (!isset($this->tpl_vars[$tpl_var])) {
-                $this->tpl_vars[$tpl_var] = new Smarty_Variable();
-            }
-            if (!is_array($this->tpl_vars[$tpl_var]->value)) {
-                settype($this->tpl_vars[$tpl_var]->value, 'array');
-            }
-            if ($merge && is_array($value)) {
-                foreach ($value as $_key => $_val) {
-                    $this->tpl_vars[$tpl_var]->value[$_key] = &$value[$_key];
-                }
-            } else {
-                $this->tpl_vars[$tpl_var]->value[] = &$value;
-            }
-        }
-
+        Smarty_Internal_Extension_Append::appendByRef($this, $tpl_var, $value, $merge);
         return $this;
     }
 
diff --git a/libs/sysplugins/smarty_internal_extension_append.php b/libs/sysplugins/smarty_internal_extension_append.php
new file mode 100644
index 00000000..0845fb2f
--- /dev/null
+++ b/libs/sysplugins/smarty_internal_extension_append.php
@@ -0,0 +1,105 @@
+<?php
+
+/**
+ * Smarty Extension Append
+ *
+ * getStreamVariable() method
+ *
+ * @package    Smarty
+ * @subpackage PluginsInternal
+ * @author     Uwe Tews
+ */
+class Smarty_Internal_Extension_Append
+{
+    /**
+     * appends values to template variables
+     *
+     * @param  array|string $tpl_var the template variable name(s)
+     * @param  mixed        $value   the value to append
+     * @param  boolean      $merge   flag if array elements shall be merged
+     * @param  boolean      $nocache if true any output of this variable will be not cached
+     *
+     * @return Smarty_Internal_Data current Smarty_Internal_Data (or Smarty or Smarty_Internal_Template) instance for chaining
+     */
+    public static function append($obj, $tpl_var, $value, $merge, $nocache)
+    {
+        if (is_array($tpl_var)) {
+            // $tpl_var is an array, ignore $value
+            foreach ($tpl_var as $_key => $_val) {
+                if ($_key != '') {
+                    if (!isset($obj->tpl_vars[$_key])) {
+                        $tpl_var_inst = Smarty_Internal_Extension_GetVars::getVariable($obj, $_key, null, true, false);
+                        if ($tpl_var_inst instanceof Smarty_Undefined_Variable) {
+                            $obj->tpl_vars[$_key] = new Smarty_Variable(null, $nocache);
+                        } else {
+                            $obj->tpl_vars[$_key] = clone $tpl_var_inst;
+                        }
+                    }
+                    if (!(is_array($obj->tpl_vars[$_key]->value) || $obj->tpl_vars[$_key]->value instanceof ArrayAccess)) {
+                        settype($obj->tpl_vars[$_key]->value, 'array');
+                    }
+                    if ($merge && is_array($_val)) {
+                        foreach ($_val as $_mkey => $_mval) {
+                            $obj->tpl_vars[$_key]->value[$_mkey] = $_mval;
+                        }
+                    } else {
+                        $obj->tpl_vars[$_key]->value[] = $_val;
+                    }
+                }
+            }
+        } else {
+            if ($tpl_var != '' && isset($value)) {
+                if (!isset($obj->tpl_vars[$tpl_var])) {
+                    $tpl_var_inst = Smarty_Internal_Extension_GetVars::getVariable($obj, $tpl_var, null, true, false);
+                    if ($tpl_var_inst instanceof Smarty_Undefined_Variable) {
+                        $obj->tpl_vars[$tpl_var] = new Smarty_Variable(null, $nocache);
+                    } else {
+                        $obj->tpl_vars[$tpl_var] = clone $tpl_var_inst;
+                    }
+                }
+                if (!(is_array($obj->tpl_vars[$tpl_var]->value) || $obj->tpl_vars[$tpl_var]->value instanceof ArrayAccess)) {
+                    settype($obj->tpl_vars[$tpl_var]->value, 'array');
+                }
+                if ($merge && is_array($value)) {
+                    foreach ($value as $_mkey => $_mval) {
+                        $obj->tpl_vars[$tpl_var]->value[$_mkey] = $_mval;
+                    }
+                } else {
+                    $obj->tpl_vars[$tpl_var]->value[] = $value;
+                }
+            }
+        }
+
+        return $obj;
+    }
+
+    /**
+     * appends values to template variables by reference
+     *
+     * @param  string  $tpl_var the template variable name
+     * @param  mixed   &$value  the referenced value to append
+     * @param  boolean $merge   flag if array elements shall be merged
+     *
+     * @return Smarty_Internal_Data current Smarty_Internal_Data (or Smarty or Smarty_Internal_Template) instance for chaining
+     */
+    public static function appendByRef($obj, $tpl_var, &$value, $merge)
+    {
+        if ($tpl_var != '' && isset($value)) {
+            if (!isset($obj->tpl_vars[$tpl_var])) {
+                $obj->tpl_vars[$tpl_var] = new Smarty_Variable();
+            }
+            if (!is_array($obj->tpl_vars[$tpl_var]->value)) {
+                settype($obj->tpl_vars[$tpl_var]->value, 'array');
+            }
+            if ($merge && is_array($value)) {
+                foreach ($value as $_key => $_val) {
+                    $obj->tpl_vars[$tpl_var]->value[$_key] = &$value[$_key];
+                }
+            } else {
+                $obj->tpl_vars[$tpl_var]->value[] = &$value;
+            }
+        }
+
+        return $obj;
+    }
+}
\ No newline at end of file