diff --git a/config/layers.yml b/config/layers.yml
index 98ef2e6915..30cf29d298 100644
--- a/config/layers.yml
+++ b/config/layers.yml
@@ -39,6 +39,7 @@
         href: "https://www.thunderforest.com/"
 
 - leafletOsmId: "TransportMap"
+  leafletOsmDarkId: "TransportDarkMap"
   code: "T"
   layerId: "transportmap"
   nameId: "transport_map"