diff --git a/objects/Object.php b/objects/Object.php
index b42564d069bf..2ff1629180ea 100644
--- a/objects/Object.php
+++ b/objects/Object.php
@@ -1172,7 +1172,7 @@ public function deleteCache($clearFirstPageCache = false, $schedule=true)
         TimeLogStart($timeLog);
         $prefix = $this->getCacheSubdir();
         if (class_exists('CachesInDB')) {
-            _error_log("deleteCache CachesInDB");
+            _error_log("deleteCache CachesInDB prefix=$prefix");
             CacheDB::deleteCacheStartingWith($prefix, $schedule);
         }
         if(!$schedule){