diff --git a/libraries/cms/component/helper.php b/libraries/cms/component/helper.php
index 1b87717919e54..7d44b1576ad1c 100644
--- a/libraries/cms/component/helper.php
+++ b/libraries/cms/component/helper.php
@@ -338,9 +338,20 @@ public static function renderComponent($option, $params = array())
 		$file = substr($option, 4);
 
 		// Define component path.
-		define('JPATH_COMPONENT', JPATH_BASE . '/components/' . $option);
-		define('JPATH_COMPONENT_SITE', JPATH_SITE . '/components/' . $option);
-		define('JPATH_COMPONENT_ADMINISTRATOR', JPATH_ADMINISTRATOR . '/components/' . $option);
+		if (!defined('JPATH_COMPONENT'))
+		{
+			define('JPATH_COMPONENT', JPATH_BASE . '/components/' . $option);
+		}
+
+		if (!defined('JPATH_COMPONENT_SITE'))
+		{
+			define('JPATH_COMPONENT_SITE', JPATH_SITE . '/components/' . $option);
+		}
+
+		if (!defined('JPATH_COMPONENT_ADMINISTRATOR'))
+		{
+			define('JPATH_COMPONENT_ADMINISTRATOR', JPATH_ADMINISTRATOR . '/components/' . $option);
+		}
 
 		$path = JPATH_COMPONENT . '/' . $file . '.php';