diff --git a/includes/common.inc b/includes/common.inc
index 350458bef71..b8cdc11a3c7 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -1003,7 +1003,7 @@ function form_select($title, $name, $value, $options, $description = NULL, $extr
   foreach ($options as $key => $choice) {
     $select .= "<option value=\"$key\"". (is_array($value) ? (in_array($key, $value) ? " selected=\"selected\"" : "") : ($value == $key ? " selected=\"selected\"" : "")) .">". check_form($choice) ."</option>";
   }
-  return theme("form_element", $title, "<select name=\"edit[$name]". ($multiple ? "[]" : "") ."\"". ($multiple ? " multiple " : "") . ($extra ? " $extra" : "") ." id=\"$name\">$select</select>", $description, $name);
+  return theme("form_element", $title, "<select name=\"edit[$name]". ($multiple ? "[]" : "") ."\"". ($multiple ? " multiple=\"multiple\" " : "") . ($extra ? " $extra" : "") ." id=\"$name\">$select</select>", $description, $name);
 }
 
 function form_file($title, $name, $size, $description = NULL) {