diff --git a/src/tales.php b/src/tales.php
index 1bde50b..bc3be4f 100644
--- a/src/tales.php
+++ b/src/tales.php
@@ -30,6 +30,21 @@ class Component_Tales implements PHPTAL_Tales
     }
 }
 
+class Assets_Tales implements PHPTAL_Tales
+{
+    static public function assets($expression, $nothrow = false)
+    {
+        $s = PHPTAL_Php_TalesInternal::string($expression);
+        return "phptal_asset(" . $s . ")";
+    }
+}
+
+function phptal_asset($s) {    
+    if (class_exists("Controller_Site")) {
+        Controller_Site::addStyleSheet($s);
+    }
+    return "";
+}
 
 function phptal_date ($e)
 {
@@ -68,4 +83,5 @@ $tales = PHPTAL_TalesRegistry::getInstance();
 $tales->registerPrefix('component', array('Component_Tales', 'component'));
 $tales->registerPrefix('date', array('DateTime_Tales', 'date'));
 $tales->registerPrefix('time', array('DateTime_Tales', 'time'));
+$tales->registerPrefix('assets', array('Assets_Tales', 'assets'));