diff --git a/client/renderer/interface.yaml b/client/renderer/interface.yaml
index 2fd9274..b94d80f 100644
--- a/client/renderer/interface.yaml
+++ b/client/renderer/interface.yaml
@@ -42,7 +42,7 @@
 - name: cdb_geocode_postalcode_polygon
   return_type: Geometry
   params:
-    - { name: postal_code,  type: integer}
+    - { name: postal_code,  type: double precision}
     - { name: country_name, type: text}
 
 - name: cdb_geocode_postalcode_point
@@ -54,7 +54,7 @@
 - name: cdb_geocode_postalcode_point
   return_type: Geometry
   params:
-    - { name: postal_code,  type: integer}
+    - { name: postal_code,  type: double precision}
     - { name: country_name, type: text}
 
 - name: cdb_geocode_ipaddress_point
diff --git a/server/extension/sql/60_postalcodes.sql b/server/extension/sql/60_postalcodes.sql
index e7e8101..3639d5d 100644
--- a/server/extension/sql/60_postalcodes.sql
+++ b/server/extension/sql/60_postalcodes.sql
@@ -1,4 +1,4 @@
-CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_point(username text, orgname text, code integer)
+CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_point(username text, orgname text, code double precision)
 RETURNS Geometry AS $$
   SELECT cdb_dataservices_server.cdb_geocode_postalcode_point(username, orgname, code::text);
 $$ LANGUAGE SQL;
@@ -40,7 +40,7 @@ RETURNS Geometry AS $$
 $$ LANGUAGE plpythonu;
 
 
-CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_point(username text, orgname text, code integer, country text)
+CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_point(username text, orgname text, code double precision, country text)
 RETURNS Geometry AS $$
   SELECT cdb_dataservices_server.cdb_geocode_postalcode_point(username, orgname, code::text, country)
 $$ LANGUAGE SQL;
@@ -82,7 +82,7 @@ RETURNS Geometry AS $$
 $$ LANGUAGE plpythonu;
 
 
-CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_polygon(username text, orgname text, code integer)
+CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_polygon(username text, orgname text, code double precision)
 RETURNS Geometry AS $$
   SELECT cdb_dataservices_server.cdb_geocode_postalcode_polygon(username, orgname, code::text)
 $$ LANGUAGE SQL;
@@ -124,7 +124,7 @@ RETURNS Geometry AS $$
 $$ LANGUAGE plpythonu;
 
 
-CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_polygon(username text, orgname text, code integer, country text)
+CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_geocode_postalcode_polygon(username text, orgname text, code double precision, country text)
 RETURNS Geometry AS $$
   SELECT cdb_dataservices_server.cdb_geocode_postalcode_polygon(username, orgname, code::text, country)
 $$ LANGUAGE SQL;