diff --git a/change_log.txt b/change_log.txt
index cb7a7347..e19d526a 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -3,6 +3,7 @@
   - bugfix $smarty_>debugging = true; did E_NOTICE messages when {eval} tag was used https://github.com/smarty-php/smarty/issues/266
   - bugfix Class 'Smarty_Internal_Runtime_ValidateCompiled' not found when upgrading from some older Smarty versions with existing
            compiled or cached template files https://github.com/smarty-php/smarty/issues/269
+  - optimization remove unneeded call to update acopes when {assign} scope and template scope was local (default)
 
 ===== 3.1.30 ===== (07.08.2016)
 
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index 7702e02e..e7b071e4 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -121,7 +121,7 @@ class Smarty extends Smarty_Internal_TemplateBase
     /**
      * smarty version
      */
-    const SMARTY_VERSION = '3.1.31-dev/3';
+    const SMARTY_VERSION = '3.1.31-dev/4';
 
     /**
      * define variable scopes
diff --git a/libs/sysplugins/smarty_internal_template.php b/libs/sysplugins/smarty_internal_template.php
index e1732ca4..01eedb8a 100644
--- a/libs/sysplugins/smarty_internal_template.php
+++ b/libs/sysplugins/smarty_internal_template.php
@@ -398,7 +398,7 @@ class Smarty_Internal_Template extends Smarty_Internal_TemplateBase
             $this->tpl_vars[ $varName ] = new Smarty_Variable($value, $nocache || $this->isRenderingCache);
         }
         if ($scope >= 0) {
-            if (isset($scope) || isset($this->scope)) {
+            if ($scope > 0 || $this->scope > 0) {
                 $this->smarty->ext->_updateScope->_updateScope($this, $varName, $scope);
             }
         }