diff --git a/addons/project/models/project.py b/addons/project/models/project.py
index 1325f96d586..11205853f08 100644
--- a/addons/project/models/project.py
+++ b/addons/project/models/project.py
@@ -38,7 +38,6 @@ PROJECT_TASK_READABLE_FIELDS = {
     'company_id',
     'displayed_image_id',
     'display_name',
-    'priority',
     'portal_user_names',
 }
 
@@ -54,6 +53,7 @@ PROJECT_TASK_WRITABLE_FIELDS = {
     'kanban_state',
     'child_ids',
     'parent_id',
+    'priority',
 }
 
 class ProjectTaskType(models.Model):