diff --git a/contract/models/account_analytic_contract_line.py b/contract/models/account_analytic_contract_line.py
index 9dbb0f05..5143c901 100644
--- a/contract/models/account_analytic_contract_line.py
+++ b/contract/models/account_analytic_contract_line.py
@@ -35,6 +35,7 @@ class AccountAnalyticContractLine(models.Model):
     )
     quantity = fields.Float(
         default=1.0,
+        digits=dp.get_precision('Product Unit of Measure'),
         required=True,
     )
     uom_id = fields.Many2one(