diff --git a/src/authentic2_auth_fc/views.py b/src/authentic2_auth_fc/views.py
index 177f3a1..e1d41f1 100644
--- a/src/authentic2_auth_fc/views.py
+++ b/src/authentic2_auth_fc/views.py
@@ -472,7 +472,8 @@ class UnlinkView(LoggerMixin, FormView):
     def get_success_url(self):
         url = reverse('account_management')
         if app_settings.logout_when_unlink:
-            url = utils.build_logout_url(self.request, next_url=url)
+            # logout URL can be None if not session exists with FC
+            url = utils.build_logout_url(self.request, next_url=url) or url
         return url
 
     def get_form_class(self):