diff --git a/configuration.rst b/configuration.rst
index fe3d7ac..0a86706 100644
--- a/configuration.rst
+++ b/configuration.rst
@@ -42,6 +42,7 @@ Examplary configuration
       nokia_here_appid:
       nokia_here_token:
       thunderforest_api_key:
+      swissTopoMap_show:  false
       mapbox_api_key:
       geonames_username:
       perl_path: /usr/bin/perl
@@ -113,6 +114,8 @@ nokia\_here\_token
     Token for HERE access
 thunderforest\_api\_key
     Api key for thunderforest layers (for activity maps), see `thunderforest.com <https://www.thunderforest.com/docs/apikeys/>`_
+swissTopoMap\_show
+    Needs registration, see `geo.admin.ch <https://www.geo.admin.ch/de/geo-dienstleistungen/geodienste/darstellungsdienste-webmapping-webgis-anwendungen/programmierschnittstelle-api/anmeldung.html>`_
 mapbox\_api\_key
     Api key for mapbox outdoor layer (for activity maps), see `mapbox.com <https://www.mapbox.com/help/create-api-access-token/>`_
 geonames\_username