diff --git a/plugins/views_plugin_style.inc b/plugins/views_plugin_style.inc
index fe12607..a88bef8 100644
--- a/plugins/views_plugin_style.inc
+++ b/plugins/views_plugin_style.inc
@@ -139,7 +139,7 @@ class views_plugin_style extends views_plugin {
 
       // Convert whatever the result is to a nice clean class name
       foreach ($classes as &$class) {
-        $class = drupal_html_class($class);
+        $class = views_clean_css_identifier($class);
       }
       return implode(' ', $classes);
     }