diff --git a/addons/project/project.py b/addons/project/project.py
index 32841cde927..3f80a075da9 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -582,7 +582,7 @@ class task(osv.osv):
             project = self.pool.get('project.project').browse(cr, uid, project_id, context=context)
             if project and project.partner_id:
                 return project.partner_id.id
-        return super(task, self)._get_default_partner(cr, uid, context=context)
+        return False
 
     def _get_default_project_id(self, cr, uid, context=None):
         """ Gives default section by checking if present in the context """
diff --git a/addons/project_issue/project_issue.py b/addons/project_issue/project_issue.py
index 501202a3791..cc71ae7cfa9 100644
--- a/addons/project_issue/project_issue.py
+++ b/addons/project_issue/project_issue.py
@@ -75,7 +75,7 @@ class project_issue(osv.Model):
             project = self.pool.get('project.project').browse(cr, uid, project_id, context=context)
             if project and project.partner_id:
                 return project.partner_id.id
-        return super(project_issue, self)._get_default_partner(cr, uid, context=context)
+        return False
 
     def _get_default_project_id(self, cr, uid, context=None):
         """ Gives default project by checking if present in the context """