diff --git a/docs/customize/Settings.md b/docs/customize/Settings.md
index 9bd44f59..3d898b29 100644
--- a/docs/customize/Settings.md
+++ b/docs/customize/Settings.md
@@ -141,22 +141,6 @@ When this setting is enabled, search and reverse queries also take data
 from [Tiger house number data](Tiger.md) into account.
 
 
-#### NOMINATIM_USE_AUX_LOCATION_DATA
-
-| Summary            |                                                     |
-| --------------     | --------------------------------------------------- |
-| **Description:**   | Enable searching in external house number tables |
-| **Format:**        | boolean |
-| **Default:**       | no |
-| **After Changes:** | run `nominatim refresh --functions` |
-| **Comment:**       | Do not use. |
-
-When this setting is enabled, search queries also take data from external
-house number tables into account.
-
-*Warning:* This feature is currently unmaintained and should not be used.
-
-
 #### NOMINATIM_HTTP_PROXY
 
 | Summary            |                                                     |
diff --git a/settings/env.defaults b/settings/env.defaults
index 827e3f2a..691e4d38 100644
--- a/settings/env.defaults
+++ b/settings/env.defaults
@@ -38,10 +38,6 @@ NOMINATIM_TOKENIZER_CONFIG=
 # Changing this value requires to run ./utils/setup --create-functions.
 NOMINATIM_USE_US_TIGER_DATA=no
 
-# Search in the auxiliary housenumber table.
-# Changing this value requires to run ./utils/setup --create-functions.
-NOMINATIM_USE_AUX_LOCATION_DATA=no
-
 # Proxy settings
 # The following settings allow to set a proxy to use when remotely downloading
 # data. Host and port are required. Login and password are optional.