diff --git a/customs.py b/customs.py
index b67bfba0d6..8be04d500a 100644
--- a/customs.py
+++ b/customs.py
@@ -37,7 +37,7 @@ class TariffCode(DeactivableMixin, ModelSQL, ModelView, MatchMixin):
     __name__ = 'customs.tariff.code'
     _rec_name = 'code'
     code = fields.Char('Code', required=True,
-        help='The code from Harmonized System of Nomenclature')
+        help='The code from Harmonized System of Nomenclature.')
     description = fields.Char('Description', translate=True)
     country = fields.Many2One('country.country', 'Country')
     # TODO country group
diff --git a/product.py b/product.py
index 46ddbdef96..13e8241e65 100644
--- a/product.py
+++ b/product.py
@@ -22,7 +22,7 @@ class Category(metaclass=PoolMeta):
             'invisible': ~Eval('customs', False),
             },
         depends=['customs'],
-        help='Use the tariff codes defined on the parent category')
+        help='Use the tariff codes defined on the parent category.')
     tariff_codes = fields.One2Many('product-customs.tariff.code',
         'product', 'Tariff Codes', order=[('sequence', 'ASC'), ('id', 'ASC')],
         states={
@@ -99,7 +99,7 @@ class Template(metaclass=PoolMeta):
             },
         depends=['tariff_codes_category'])
     tariff_codes_category = fields.Boolean("Use Category's Tariff Codes",
-        help='Use the tariff codes defined on the category')
+        help='Use the tariff codes defined on the category.')
     tariff_codes = fields.One2Many('product-customs.tariff.code',
         'product', 'Tariff Codes', order=[('sequence', 'ASC'), ('id', 'ASC')],
         states={