diff --git a/modules/account_stock_eu/stock.py b/modules/account_stock_eu/stock.py
index 0adce5955b..56e59d9563 100644
--- a/modules/account_stock_eu/stock.py
+++ b/modules/account_stock_eu/stock.py
@@ -248,6 +248,8 @@ class Move(metaclass=PoolMeta):
                     and (not move.intrastat_from_country
                         or not move.intrastat_to_country)):
                 unknown_country.append(move)
+            if move.intrastat_type and move.internal_weight is None:
+                move.internal_weight = move.on_change_with_internal_weight()
         if unknown_country:
             warning_name = Warning.format(
                 'intrastat_country', unknown_country)