diff --git a/passbook/providers/app_gw/templates/app_gw/setup_modal.html b/passbook/providers/app_gw/templates/app_gw/setup_modal.html
index 5e1cea562..1f22760dc 100644
--- a/passbook/providers/app_gw/templates/app_gw/setup_modal.html
+++ b/passbook/providers/app_gw/templates/app_gw/setup_modal.html
@@ -43,7 +43,7 @@ services:
       OAUTH2_PROXY_REDIRECT_URL: https://{{ provider.external_host }}/oauth2/callback
       OAUTH2_PROXY_OIDC_ISSUER_URL: https://{{ request.META.HTTP_HOST }}/application/oidc
       OAUTH2_PROXY_COOKIE_SECRET: {{ cookie_secret }}
-      OAUTH2_PROXY_UPSTREAM: http://{{ provider.internal_host }}</textarea>
+      OAUTH2_PROXY_UPSTREAMS: http://{{ provider.internal_host }}</textarea>
       </div>
       <div class="modal-footer">
         <button type="button" class="btn btn-primary" data-dismiss="modal">{% trans 'Close' %}</button>