diff --git a/templates/RelationComplexTableField.ss b/templates/RelationComplexTableField.ss
index adeef9c1b..bfde4a451 100644
--- a/templates/RelationComplexTableField.ss
+++ b/templates/RelationComplexTableField.ss
@@ -29,6 +29,8 @@
 			<tr>
 				<% if Markable %><td width="18">&nbsp;</td><% end_if %>
 				<td colspan="$ItemCount">
+					<input type="hidden" id="{$id}_PopupHeight" value="$PopupHeight" disabled="disabled">
+					<input type="hidden" id="{$id}_PopupWidth" value="$PopupWidth" disabled="disabled">
 					<a class="popuplink addlink" href="$AddLink" alt="<% _t('ADD', 'Add') %>"><img src="cms/images/add.gif" alt="<% _t('ADD', 'Add') %>" /><% _t('ADD', 'Add') %> $Title</a>
 				</td>
 				<% if Can(show) %><td width="18">&nbsp;</td><% end_if %>