Don't use error suppression with ini_set()
diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
index 655aa71..9e53d4e 100644
--- a/system/database/drivers/mssql/mssql_driver.php
+++ b/system/database/drivers/mssql/mssql_driver.php
@@ -280,7 +280,7 @@
 	 */
 	protected function _db_set_charset($charset)
 	{
-		return (@ini_set('mssql.charset', $charset) !== FALSE);
+		return (ini_set('mssql.charset', $charset) !== FALSE);
 	}
 
 	// --------------------------------------------------------------------