diff --git a/golem_resource_account/__manifest__.py b/golem_resource_account/__manifest__.py
index 3560e1b..50e5cfb 100644
--- a/golem_resource_account/__manifest__.py
+++ b/golem_resource_account/__manifest__.py
@@ -20,7 +20,7 @@
     'name': 'GOLEM resources invoicing',
     'summary': 'GOLEM resources invoicing',
     'description': ''' GOLEM resources invoicing ''',
-    'version': '10.0.0.2.0',
+    'version': '10.0.0.3.0',
     'category': 'GOLEM',
     'author': 'Youssef El Ouahby, Fabien Bourgeois',
     'license': 'AGPL-3',
diff --git a/golem_resource_account/models/golem_resource_reservation.py b/golem_resource_account/models/golem_resource_reservation.py
index 94b35ac..ed92997 100644
--- a/golem_resource_account/models/golem_resource_reservation.py
+++ b/golem_resource_account/models/golem_resource_reservation.py
@@ -75,11 +75,13 @@ class GolemResourceReservation(models.Model):
                 product.categ_id.property_account_income_categ_id.id
             delta = fields.Datetime.from_string(reservation.date_stop) - \
                 fields.Datetime.from_string(reservation.date_start)
-            quantity = 1
-            if product.uom_id.name == 'Hour(s)' or product.uom_id.name == 'Unit(s)':
-                quantity = int((delta.days * 24) + (delta.seconds/3600.0))
-            elif product.uom_id.name == 'Day(s)':
-                quantity = int(delta.days + (delta.seconds/86400.0))#number of seconds in a day
+            quantity = 1.0
+            # Make quantity coherent with UoM
+            if product.uom_id in (self.env.ref('product.product_uom_hour'),
+                                  self.env.ref('product.product_uom_unit')):
+                quantity = int(round((delta.days * 24.0) + (delta.seconds/3600.0)))
+            elif product.uom_id == self.env.ref('product.product_uom_day'):
+                quantity = int(round(delta.days + (delta.seconds/86400.0)))
             line_id = self.env['account.invoice.line'].create({
                 'invoice_id': invoice_id.id,
                 'name': product.name,