diff --git a/system/helpers/form_helper.php b/system/helpers/form_helper.php
index c3a3ccb..a727f47 100644
--- a/system/helpers/form_helper.php
+++ b/system/helpers/form_helper.php
@@ -231,7 +231,8 @@
 	}
 
 	if ($extra != '') $extra = ' '.$extra;
-	$multiple = (count($selected) > 1) ? ' multiple="multiple"' : '';
+
+	$multiple = (count($selected) > 1 && strpos($extra, 'multiple') === FALSE) ? ' multiple="multiple"' : '';
 
 	$form = '<select name="'.$name.'"'.$extra.$multiple.">\n";