diff --git a/product/ERP5Form/MultiRelationField.py b/product/ERP5Form/MultiRelationField.py
index 10f3e36fb31864dddc13643a444f3273def97ff6..290db2d936d25ea7989a57f77e7a0fb921340b4d 100644
--- a/product/ERP5Form/MultiRelationField.py
+++ b/product/ERP5Form/MultiRelationField.py
@@ -307,7 +307,7 @@ class MultiRelationStringFieldWidget(Widget.LinesTextAreaWidget,
     here = REQUEST['here']
     portal_url = getToolByName(here, 'portal_url')
     portal_url_string = portal_url()
-    portal_selections_url_string = here.portal_selections.absolute_url_path()
+    portal_selections_url_string = here.portal_url.getRelativeContentURL(here.portal_selections)
     if sub_index is None:
       sub_index_string = ''
     else: