diff --git a/system/database/DB_active_rec.php b/system/database/DB_active_rec.php
index 1820bd2..49d4387 100644
--- a/system/database/DB_active_rec.php
+++ b/system/database/DB_active_rec.php
@@ -483,7 +483,6 @@
 	 * @access	public
 	 * @param	string	The field to search
 	 * @param	array	The values searched on
-
 	 * @return	object
 	 */
 	function where_in($key = NULL, $values = NULL)
@@ -502,7 +501,6 @@
 	 * @access	public
 	 * @param	string	The field to search
 	 * @param	array	The values searched on
-
 	 * @return	object
 	 */
 	function or_where_in($key = NULL, $values = NULL)
@@ -521,7 +519,6 @@
 	 * @access	public
 	 * @param	string	The field to search
 	 * @param	array	The values searched on
-
 	 * @return	object
 	 */
 	function where_not_in($key = NULL, $values = NULL)
@@ -540,12 +537,11 @@
 	 * @access	public
 	 * @param	string	The field to search
 	 * @param	array	The values searched on
-
 	 * @return	object
 	 */
 	function or_where_not_in($key = NULL, $values = NULL)
 	{	 	
-		return $this->_where_in($key, $values, FALSE, 'OR ');
+		return $this->_where_in($key, $values, TRUE, 'OR ');
 	}
 
 	// --------------------------------------------------------------------
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 851ec7a..351e1e8 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -114,6 +114,7 @@
 	<li>Fixed DB Driver and MySQLi result driver checking for resources instead of objects (#3461).</li>
 	<li>Fixed an incorrect documentation of $this-&gt;load-&gt;language (#3520).</li>
 	<li>Fixed an AR_caching error where it wasn't tracking table aliases (#3463).</li>
+	<li>Fixed an AR bug with or_where_not_in() (#4171).</li>
 	<li>Fixed an AR bug when joining with a table alias and table prefix (#4400).</li>
 	<li>Fixed a bug in DB Forge, when inserting an id field (#3456).</li>
 	<li>Fixed a bug in the DB class testing the $params argument.</li>