diff --git a/mozilla/webtools/addons/shared/bin/update-hashes.php b/mozilla/webtools/addons/shared/bin/update-hashes.php
index ca0cc6851b1..d786fb04d0b 100644
--- a/mozilla/webtools/addons/shared/bin/update-hashes.php
+++ b/mozilla/webtools/addons/shared/bin/update-hashes.php
@@ -1,11 +1,10 @@
 <?php
 /**
- * Maintenance script for addons.mozilla.org.
+ * The purpose of this script is to retro-actively update existing add-ons
+ * with valid hashes.
  *
- * The purpose of this document is to perform periodic tasks that should not be
- * done everytime a download occurs in install.php.  This should reduce
- * unnecessary DELETE and UPDATE queries and lighten the load on the database
- * backend.
+ * We may not necessarily use this, but it was written just in case we need
+ * to run the update in the future.
  *
  * This script should not ever be accessed over HTTP, and instead run via cron.
  * Only sysadmins should be responsible for operating this script.
@@ -28,19 +27,25 @@ require_once('../../public/inc/config.php');
 // For the addon object and db stuff
 require_once('../../public/inc/includes.php');
 
+$path = '/data/amo/files/ftp/';  // Path to the directory that contains approved XPIs.  Adjust to point to proper path.
 $versions = array();
 $hashes = array();
 
 $db = new AMO_SQL();
 
-$db->query("SELECT name,type,vid,uri FROM main m INNER JOIN version v ON v.id = m.id WHERE m.id=735", SQL_ALL, SQL_ASSOC);
+$db->query("SELECT name,version,type,vid,uri FROM main m INNER JOIN version v ON v.id = m.id WHERE v.approved='yes'", SQL_ALL, SQL_ASSOC);
 $versions=$db->record;
 
 foreach($versions as $version) {
-    // Here we are making some assumptions on the file path.
-    // Change the first part if the server you are running on has the .xpi repository in a different location.
-    $buf = sha1_file('/data/amo/files/ftp/'.($version['type']=='E'?'extensions/':'themes/').str_replace(' ','_',strtolower($version['name'])).'/'.basename($version['uri']));
-    $db->query("UPDATE version SET hash='sha1:{$buf}' WHERE vid={$version['vid']}");
+
+    $file = '/data/amo/files/ftp/'.($version['type']=='E'?'extensions/':'themes/').str_replace(' ','_',strtolower($version['name'])).'/'.basename($version['uri']);
+
+    // If the file exists, get its sum and update its record.
+    if (file_exists($file)) {
+        $buf = sha1_file($file);
+        $db->query("UPDATE version SET hash='sha1:{$buf}' WHERE vid={$version['vid']}");
+        echo "Updated {$version['name']} {$version['version']} hash to sha1:{$buf}\n";
+    }
 }
 
 exit;