diff --git a/addons/hr/models/hr_plan.py b/addons/hr/models/hr_plan.py
index dd45a280a6f..671da986b63 100644
--- a/addons/hr/models/hr_plan.py
+++ b/addons/hr/models/hr_plan.py
@@ -50,7 +50,7 @@ class HrPlanActivityType(models.Model):
         elif self.responsible == 'other':
             responsible = self.responsible_id
             if not responsible:
-                raise UserError(_('No specific user given on activity.') % employee.name)
+                raise UserError(_('No specific user given on activity.'))
         return responsible