add missing @param tag
diff --git a/system/helpers/typography_helper.php b/system/helpers/typography_helper.php
index d5b52a8..e8cb037 100644
--- a/system/helpers/typography_helper.php
+++ b/system/helpers/typography_helper.php
@@ -76,6 +76,7 @@
  *
  * @access	public
  * @param	string
+ * @param   string
  * @return	string
  */
 if ( ! function_exists('entity_decode'))