diff --git a/project_average_acceptable_time/controllers/custom_portal.py b/project_average_acceptable_time/controllers/custom_portal.py
index ac72309..2226320 100644
--- a/project_average_acceptable_time/controllers/custom_portal.py
+++ b/project_average_acceptable_time/controllers/custom_portal.py
@@ -7,7 +7,7 @@ from odoo.addons.portal.controllers.portal import CustomerPortal
 class CustomCustomerPortal(CustomerPortal):
     @route(["/my/account"], type="http", auth="user", website=True)
     def account(self, redirect=None, **post):
-        self.OPTIONAL_BILLING_FIELDS.append("average_acceptable_time")
+        self.OPTIONAL_BILLING_FIELDS.append("average_acceptable_time") #unecessary save in res partner, but necessary to avoid error on form post
 
         response = super(CustomCustomerPortal, self).account(redirect, **post)
         
diff --git a/project_average_acceptable_time/models/__init__.py b/project_average_acceptable_time/models/__init__.py
index c6089d0..8186acb 100644
--- a/project_average_acceptable_time/models/__init__.py
+++ b/project_average_acceptable_time/models/__init__.py
@@ -1,2 +1,3 @@
 
-from . import project_project
\ No newline at end of file
+from . import project_project
+from . import res_partner
\ No newline at end of file
diff --git a/project_average_acceptable_time/models/res_partner.py b/project_average_acceptable_time/models/res_partner.py
new file mode 100644
index 0000000..a5e5ec9
--- /dev/null
+++ b/project_average_acceptable_time/models/res_partner.py
@@ -0,0 +1,10 @@
+
+from odoo import models, fields, _, api
+
+
+class ResPartner(models.Model):
+    _inherit = "res.partner"
+
+    average_acceptable_time = fields.Float('Average acceptable time') # not used, but necessary to post custom field from /my/account
+
+    
\ No newline at end of file
diff --git a/project_average_acceptable_time/views/project_project.xml b/project_average_acceptable_time/views/project_project.xml
index 3e887bc..c708f21 100644
--- a/project_average_acceptable_time/views/project_project.xml
+++ b/project_average_acceptable_time/views/project_project.xml
@@ -24,6 +24,7 @@
         <field name="inherit_id" ref="project.edit_project"/>
         <field name="arch" type="xml">
             <field name="subtask_project_id" position="after">
+                <label for="average_acceptable_time" />
                 <field name="average_acceptable_time" widget="float_time"/>
             </field>
         </field>