diff --git a/lib-sql/functions/address_lookup.sql b/lib-sql/functions/address_lookup.sql
index 2bbfcd5c..3a37953a 100644
--- a/lib-sql/functions/address_lookup.sql
+++ b/lib-sql/functions/address_lookup.sql
@@ -261,7 +261,7 @@ BEGIN
       -- If the place had a postcode assigned, take this one only
       -- into consideration when it is an area and the place does not have
       -- a postcode itself.
-      IF location.fromarea AND location.isaddress
+      IF location.fromarea AND location_isaddress
          AND (place.address is null or not place.address ? 'postcode')
       THEN
         place.postcode := null; -- remove the less exact postcode