diff --git a/purchase.py b/purchase.py
index 060a4e290e..c967071580 100644
--- a/purchase.py
+++ b/purchase.py
@@ -272,9 +272,7 @@ class QuotationLine(ModelSQL, ModelView):
             'required': ~Eval('product')
             },
         depends=['product'])
-    quantity = fields.Float(
-        'Quantity', digits=(16, Eval('unit_digits', 2)), required=True,
-        depends=['unit_digits'])
+    quantity = fields.Float("Quantity", digits='unit', required=True)
     unit = fields.Many2One(
         'product.uom', 'Unit', ondelete='RESTRICT',
         states={
@@ -286,8 +284,6 @@ class QuotationLine(ModelSQL, ModelView):
                 ('category', '!=', -1)),
         ],
         depends=['product', 'product_uom_category'])
-    unit_digits = fields.Function(
-        fields.Integer('Unit Digits'), 'on_change_with_unit_digits')
     product_uom_category = fields.Function(
         fields.Many2One('product.uom.category', 'Product Uom Category'),
         'on_change_with_product_uom_category')
@@ -354,12 +350,6 @@ class QuotationLine(ModelSQL, ModelView):
                 self.currency = self.request.company.currency
             self.supply_date = self.request.supply_date or datetime.date.max
 
-    @fields.depends('unit')
-    def on_change_with_unit_digits(self, name=None):
-        if self.unit:
-            return self.unit.digits
-        return None
-
     @fields.depends('product')
     def on_change_with_product_uom_category(self, name=None):
         if self.product:
diff --git a/quotation.fodt b/quotation.fodt
index 7d4a41b646..be6c622ce1 100644
--- a/quotation.fodt
+++ b/quotation.fodt
@@ -689,7 +689,7 @@
       <text:p text:style-name="P26"><text:placeholder text:placeholder-type="text">&lt;/for&gt;</text:placeholder></text:p>
      </table:table-cell>
      <table:table-cell table:style-name="Tableau1.A3" office:value-type="string">
-      <text:p text:style-name="P17"><text:placeholder text:placeholder-type="text">&lt;(format_number(quotation_line.quantity, quotation.supplier.lang, digits=quotation_line.unit_digits) + (quotation_line.unit and (&apos; &apos; + quotation_line.unit.symbol) or &apos;&apos;)) or &apos;&apos;&gt;</text:placeholder></text:p>
+      <text:p text:style-name="P17"><text:placeholder text:placeholder-type="text">&lt;(format_number(quotation_line.quantity, quotation.supplier.lang, digits=quotation_line.unit.digits if quotation_line.unit else None) + (quotation_line.unit and (&apos; &apos; + quotation_line.unit.symbol) or &apos;&apos;)) or &apos;&apos;&gt;</text:placeholder></text:p>
      </table:table-cell>
      <table:table-cell table:style-name="Tableau1.A3" office:value-type="string">
       <text:p text:style-name="P17"><text:placeholder text:placeholder-type="text">&lt;format_currency(quotation_line.unit_price, quotation.supplier.lang, quotation_line.currency, digits=quotation_line.__class__.unit_price.digits[1]) if quotation_line.unit_price else &quot;&quot;&gt;</text:placeholder></text:p>