diff --git a/libraries/cms/html/behavior.php b/libraries/cms/html/behavior.php
index 5ceec266a5d07..e6f043428ccfb 100644
--- a/libraries/cms/html/behavior.php
+++ b/libraries/cms/html/behavior.php
@@ -578,9 +578,9 @@ public static function calendar()
 		$tag      = JFactory::getLanguage()->getTag();
 		$attribs  = array('title' => JText::_('JLIB_HTML_BEHAVIOR_GREEN'), 'media' => 'all');
 
-		JHtml::_('stylesheet', 'system/calendarjos.css', array('version' => 'auto', 'relative' => true), $attribs);
+		JHtml::_('stylesheet', 'system/calendar-jos.css', array('version' => 'auto', 'relative' => true), $attribs);
 		JHtml::_('script', $tag . '/calendar.js', array('version' => 'auto', 'relative' => true));
-		JHtml::_('script', $tag . '/calendarsetup.js', array('version' => 'auto', 'relative' => true));
+		JHtml::_('script', $tag . '/calendar-setup.js', array('version' => 'auto', 'relative' => true));
 
 		$translation = static::calendartranslation();