diff --git a/docs/config.rst b/docs/config.rst
index 4020026..cb84e46 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -275,10 +275,6 @@ For example::
     "source1": {
       "url": "mbtiles://source1.mbtiles",
       "type": "vector"
-    },
-    "terrain": {
-      "url": "mbtiles://terrain.mbtiles",
-      "encoding": "mapbox"
     }
   }
 
@@ -286,8 +282,6 @@ Alternatively, you can use ``mbtiles://{source1}`` to reference existing data ob
 In this case, the server will look into the ``config.json`` to determine what file to use by data id.
 For the config above, this is equivalent to ``mbtiles://source1.mbtiles``.
 
-If you use terrain tiles, it is possible to configure an ``encoding`` with ``mapbox`` or ``terrarium`` to enable a terrain preview mode and the ``elevation`` api for the ``data`` endpoint.
-
 PMTiles
 -------