diff --git a/system/database/DB_cache.php b/system/database/DB_cache.php
index 58e6968..ff94285 100644
--- a/system/database/DB_cache.php
+++ b/system/database/DB_cache.php
@@ -177,7 +177,7 @@
 	 */
 	public function delete_all()
 	{
-		delete_files($this->db->cachedir, TRUE);
+		delete_files($this->db->cachedir, TRUE, 0, TRUE);
 	}
 
 }