diff --git a/client/templates/20_public_functions.erb b/client/templates/20_public_functions.erb
index 4c99bd6..dd28f47 100644
--- a/client/templates/20_public_functions.erb
+++ b/client/templates/20_public_functions.erb
@@ -8,11 +8,11 @@ CREATE OR REPLACE FUNCTION <%= GEOCODER_CLIENT_SCHEMA %>.<%= name %> (<%= params
 RETURNS <%= return_type %> AS $$
 DECLARE
   ret <%= return_type %>;
-  user_config JSON;
-  geocoder_config JSON;
+  user_config json;
+  geocoder_config json;
 BEGIN
-  SELECT cartodb.CDB_Conf_GetConf('user_config') INTO user_config;
-  SELECT cartodb.CDB_Conf_GetConf('geocoder_config') INTO geocoder_config;
+  SELECT cartodb.CDB_Conf_GetConf('<%= user_config_key %>') INTO user_config;
+  SELECT cartodb.CDB_Conf_GetConf('<%= geocoder_config_key %>') INTO geocoder_config;
   SELECT <%= GEOCODER_CLIENT_SCHEMA %>._<%= name %>(session_user, user_config, geocoder_config, <%= params %>) INTO ret;
   RETURN ret;
 END;
diff --git a/interface.yaml b/interface.yaml
index 7e525a0..01b1cc0 100644
--- a/interface.yaml
+++ b/interface.yaml
@@ -1,33 +1,45 @@
 ---
 - name: geocode_admin0_polygon
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: country_name, type: text }
 
 - name: geocode_admin1_polygon
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: admin1_name, type: text }
 
 - name: geocode_admin1_polygon
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: admin1_name,  type: text }
     - { name: country_name, type: text }
 
 - name: geocode_namedplace_point
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: city_name, type: text}
 
 - name: geocode_namedplace_point
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: city_name,    type: text}
     - { name: country_name, type: text}
 
 - name: geocode_namedplace_point
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: city_name,    type: text}
     - { name: admin1_name,  type: text}
@@ -36,18 +48,24 @@
 
 - name: geocode_postalcode_polygon
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: postal_code,  type: text}
     - { name: country_name, type: text}
 
 - name: geocode_postalcode_point
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: postal_code,  type: text}
     - { name: country_name, type: text}
 
 - name: geocode_ipaddress_point
   return_type: Geometry
+  user_config_key: user_config
+  geocoder_config_key: geocoder_config
   params:
     - { name: ip_address,  type: text}
 
diff --git a/sql-template-renderer b/sql-template-renderer
index 7e11447..de5f9a7 100755
--- a/sql-template-renderer
+++ b/sql-template-renderer
@@ -27,6 +27,14 @@ class SqlTemplateRenderer
     @function_signature['return_type']
   end
 
+  def user_config_key
+    @function_signature['user_config_key']
+  end
+
+  def geocoder_config_key
+    @function_signature['geocoder_config_key']
+  end
+
   def params
     @function_signature['params'].map { |p| p['name'] }.join(', ')
   end