diff --git a/purchase.py b/purchase.py
index 919d9b37d7..904e256777 100644
--- a/purchase.py
+++ b/purchase.py
@@ -100,6 +100,9 @@ class PurchaseLine(ModelSQL, ModelView):
                 id2record[record['id']] = record
             lines = self.browse(cursor, user, ids, context=context)
             for line in lines:
+                for root_id in root_ids:
+                    id2record[line.id]['analytic_account_' \
+                            + str(root_id)] = False
                 if line.type != 'line':
                     continue
                 if not line.analytic_accounts: