diff --git a/django/contrib/auth/admin.py b/django/contrib/auth/admin.py
index 5f476f91c2..86442b9078 100644
--- a/django/contrib/auth/admin.py
+++ b/django/contrib/auth/admin.py
@@ -133,7 +133,7 @@ class UserAdmin(admin.ModelAdmin):
         adminForm = admin.helpers.AdminForm(form, fieldsets, {})
 
         context = {
-            'title': _('Change password: %s') % escape(user.username),
+            'title': _('Change password: %s') % escape(user.get_username()),
             'adminForm': adminForm,
             'form_url': form_url,
             'form': form,