diff --git a/utils/setup.php b/utils/setup.php
index c6cc7773..8988fc51 100755
--- a/utils/setup.php
+++ b/utils/setup.php
@@ -540,10 +540,8 @@ if ($aCMDResult['calculate-postcodes'] || $aCMDResult['all']) {
         $sSQL .= '  FROM us_postcode WHERE postcode NOT IN';
         $sSQL .= '        (SELECT postcode FROM location_postcode';
         $sSQL .= "          WHERE country_code = 'us')";
-    } else {
-        $sSQL .= 'TRUNCATE TABLE us_postcode';
+        if (!pg_query($oDB->connection, $sSQL)) fail(pg_last_error($oDB->connection));
     }
-    if (!pg_query($oDB->connection, $sSQL)) fail(pg_last_error($oDB->connection));
 
     // add missing postcodes for GB (if available)
     $sSQL  = 'INSERT INTO location_postcode';