diff --git a/jupyterhub/singleuser.py b/jupyterhub/singleuser.py
index 896dea3c..ccc65a21 100644
--- a/jupyterhub/singleuser.py
+++ b/jupyterhub/singleuser.py
@@ -138,6 +138,7 @@ class SingleUserNotebookApp(NotebookApp):
     hub_api_url = Unicode(config=True)
     aliases = aliases
     open_browser = False
+    trust_xheaders = True
     login_handler_class = JupyterHubLoginHandler
     logout_handler_class = JupyterHubLogoutHandler