diff --git a/change_log.txt b/change_log.txt
index f33d5232..d76a993e 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -1,5 +1,6 @@
 11/02/2009
 - added neq,lte,gte,mod as aliases to if conditions 
+- throw exception on illegal Smarty() constructor calls
 
 10/31/2009
 - change of filenames in sysplugins folder for internal spl_autoload function
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index 970ff03f..de4d14a5 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -524,15 +524,15 @@ class Smarty extends Smarty_Internal_TemplateBase {
     */
     public function __call($name, $args)
     {
+        if ($name == 'Smarty') {
+            throw new Exception('Please use parent::__construct() to call parent constuctor');
+        }
         if (!is_callable($name)) {
             $_plugin_filename = strtolower('smarty_method_' . $name . $this->php_ext);
             if (!file_exists(SMARTY_SYSPLUGINS_DIR . $_plugin_filename)) {
-                throw new Exception("Sysplugin file " . $_plugin_filename . " does not exist");
+                throw new Exception('Undefined Smarty method "'. $name .'"');
             } 
             require_once(SMARTY_SYSPLUGINS_DIR . $_plugin_filename);
-            if (!is_callable($name)) {
-                throw new Exception ("Sysplugin file " . $_plugin_filename . " does not define function " . $name);
-            } 
         } 
         return call_user_func_array($name, array_merge(array($this), $args));
     }