diff --git a/imagecache.module b/imagecache.module
index 5b05924..ed7bffb 100644
--- a/imagecache.module
+++ b/imagecache.module
@@ -399,8 +399,8 @@ function imagecache_create_url($presetname, $filepath, $bypass_browser_cache = F
  */
 function imagecache_style_path_token($presetname, $path) {
   // Drupal 6 may not yet have drupal_get_hash_salt().
-  global $db_query;
-  $salt = sha1(serialize($db_query));
+  global $db_url;
+  $salt = sha1(serialize($db_url));
   // Return the first eight characters.
   return substr(_imagecache_hmac_base64($presetname . ':' . $path, drupal_get_private_key() . $salt), 0, 8);
 }