diff --git a/elixir/apps/web/lib/web/auth.ex b/elixir/apps/web/lib/web/auth.ex
index 9aaca9310..a15c3807e 100644
--- a/elixir/apps/web/lib/web/auth.ex
+++ b/elixir/apps/web/lib/web/auth.ex
@@ -199,7 +199,7 @@ defmodule Web.Auth do
       get_load_balancer_ip_location(conn)
 
     context = %Auth.Context{
-      user_agent: conn.assigns.user_agent,
+      user_agent: Map.get(conn.assigns, :user_agent),
       remote_ip: conn.remote_ip,
       remote_ip_location_region: location_region,
       remote_ip_location_city: location_city,