diff --git a/system/helpers/url_helper.php b/system/helpers/url_helper.php
index 5f8c6ce..6a033d6 100644
--- a/system/helpers/url_helper.php
+++ b/system/helpers/url_helper.php
@@ -474,7 +474,7 @@
 	 * @param	string	$str		Input string
 	 * @param	string	$separator	Word separator
 	 *			(usually '-' or '_')
-	 * @param	bool	$lowercase	Wether to transform the output string to lowercase
+	 * @param	bool	$lowercase	Whether to transform the output string to lowercase
 	 * @return	string
 	 */
 	function url_title($str, $separator = '-', $lowercase = FALSE)