diff --git a/rma/README.rst b/rma/README.rst
index 19617464..041219ca 100644
--- a/rma/README.rst
+++ b/rma/README.rst
@@ -114,6 +114,7 @@ Contributors
 * Aaron Henriquez <ahenriquez@eficent.com>
 * Lois Rilo <lois.rilo@eficent.com>
 * Bhavesh Odedra <bodedra@opensourceintegrators.com>
+* Akim Juillerat <akim.juillerat@camptocamp.com>
 
 Maintainer
 ----------
diff --git a/rma/models/rma_operation.py b/rma/models/rma_operation.py
index bee15958..cee0ecc8 100644
--- a/rma/models/rma_operation.py
+++ b/rma/models/rma_operation.py
@@ -45,12 +45,12 @@ class RmaOperation(models.Model):
     in_route_id = fields.Many2one(
         comodel_name='stock.location.route', string='Inbound Route',
         domain=[('rma_selectable', '=', True)],
-        default=_default_routes,
+        default=lambda self: self._default_routes(),
     )
     out_route_id = fields.Many2one(
         comodel_name='stock.location.route', string='Outbound Route',
         domain=[('rma_selectable', '=', True)],
-        default=_default_routes,
+        default=lambda self: self._default_routes(),
     )
     customer_to_supplier = fields.Boolean(
         string='The customer will send to the supplier',
@@ -60,10 +60,12 @@ class RmaOperation(models.Model):
     )
     in_warehouse_id = fields.Many2one(
         comodel_name='stock.warehouse', string='Inbound Warehouse',
-        default=_default_warehouse_id)
+        default=lambda self: self._default_warehouse_id(),
+    )
     out_warehouse_id = fields.Many2one(
         comodel_name='stock.warehouse', string='Outbound Warehouse',
-        default=_default_warehouse_id)
+        default=lambda self: self._default_warehouse_id(),
+    )
     location_id = fields.Many2one(
         'stock.location', 'Send To This Company Location')
     type = fields.Selection([
diff --git a/rma/models/rma_order.py b/rma/models/rma_order.py
index 54134542..420006ab 100644
--- a/rma/models/rma_order.py
+++ b/rma/models/rma_order.py
@@ -50,12 +50,15 @@ class RmaOrder(models.Model):
         string='Group Number', index=True, copy=False)
     type = fields.Selection(
         [('customer', 'Customer'), ('supplier', 'Supplier')],
-        string="Type", required=True, default=_get_default_type, readonly=True)
+        string="Type", required=True,
+        default=lambda self: self._get_default_type(),
+        readonly=True
+    )
     reference = fields.Char(string='Partner Reference',
                             help="The partner reference of this RMA order.")
     comment = fields.Text('Additional Information')
     date_rma = fields.Datetime(string='Order Date', index=True,
-                               default=_default_date_rma)
+                               default=lambda self: self._default_date_rma(),)
     partner_id = fields.Many2one(
         comodel_name='res.partner', string='Partner', required=True)
     rma_line_ids = fields.One2many('rma.order.line', 'rma_id',
diff --git a/rma/models/rma_order_line.py b/rma/models/rma_order_line.py
index 221543f2..2c22dd98 100644
--- a/rma/models/rma_order_line.py
+++ b/rma/models/rma_order_line.py
@@ -167,7 +167,7 @@ class RmaOrderLine(models.Model):
 
     delivery_address_id = fields.Many2one(
         comodel_name='res.partner', string='Partner delivery address',
-        default=_default_delivery_address,
+        default=lambda self: self._default_delivery_address(),
         readonly=True, states={'draft': [('readonly', False)]},
         help="This address will be used to deliver repaired or replacement "
              "products.",
@@ -258,7 +258,8 @@ class RmaOrderLine(models.Model):
         default=lambda self: self.env.user.company_id)
     type = fields.Selection(
         selection=[('customer', 'Customer'), ('supplier', 'Supplier')],
-        string="Type", required=True, default=_get_default_type,
+        string="Type", required=True,
+        default=lambda self: self._get_default_type(),
         readonly=True,
     )
     customer_to_supplier = fields.Boolean(
@@ -298,19 +299,19 @@ class RmaOrderLine(models.Model):
         string='Inbound Warehouse',
         required=True,
         readonly=True, states={'draft': [('readonly', False)]},
-        default=_default_warehouse_id,
+        default=lambda self: self._default_warehouse_id(),
     )
     out_warehouse_id = fields.Many2one(
         comodel_name='stock.warehouse', string='Outbound Warehouse',
         required=True,
         readonly=True, states={'draft': [('readonly', False)]},
-        default=_default_warehouse_id,
+        default=lambda self: self._default_warehouse_id(),
     )
     location_id = fields.Many2one(
         comodel_name='stock.location', string='Send To This Company Location',
         required=True,
         readonly=True, states={'draft': [('readonly', False)]},
-        default=_default_location_id,
+        default=lambda self: self._default_location_id(),
     )
     customer_rma_id = fields.Many2one(
         'rma.order.line', string='Customer RMA line', ondelete='cascade')