diff --git a/admin/templates/default/customfield_edit.xet b/admin/templates/default/customfield_edit.xet
index ed057dda29..4627652f23 100644
--- a/admin/templates/default/customfield_edit.xet
+++ b/admin/templates/default/customfield_edit.xet
@@ -2,7 +2,7 @@
 <!-- $Id$ -->
 <overlay>
 	<template id="admin.customfield_edit" template="" lang="" group="0" version="1.9.001">
-		<grid width="450px">
+		<grid width="100%">
 			<columns>
 				<column width="100"/>
 				<column width="350"/>