diff --git a/classes/Memcached_DataObject.php b/classes/Memcached_DataObject.php
index bf61b07664..ad8876ff9d 100644
--- a/classes/Memcached_DataObject.php
+++ b/classes/Memcached_DataObject.php
@@ -99,7 +99,7 @@ class Memcached_DataObject extends DB_DataObject
     }
 
     static function cacheKey($cls, $k, $v) {
-        if (is_object($cls) || is_object($j) || is_object($v)) {
+        if (is_object($cls) || is_object($k) || is_object($v)) {
             $e = new Exception();
             common_log(LOG_ERR, __METHOD__ . ' object in param: ' .
                 str_replace("\n", " ", $e->getTraceAsString()));