diff --git a/upload/source/class/table/table_forum_forum.php b/upload/source/class/table/table_forum_forum.php
index 5bb9071a3a682537c596585a6411aab4e04e7b6d..113050e3cba2a058f5f90b187444570fe0a3621b 100644
--- a/upload/source/class/table/table_forum_forum.php
+++ b/upload/source/class/table/table_forum_forum.php
@@ -38,7 +38,8 @@ class table_forum_forum extends discuz_table
 		return DB::fetch_all("SELECT * FROM ".DB::table($this->_table)." WHERE $typesql $statussql $fupsql $limitsql");
 	}
 	public function fetch_info_by_fid($fid) {
-		if(($data = $this->fetch_cache($fid)) === false) {
+		$data = $this->fetch_cache($fid);
+		if($data === false || !array_key_exists('description', $data)) {
 			$data = DB::fetch_first("SELECT ff.*, f.* FROM %t f LEFT JOIN %t ff ON ff.fid=f.fid WHERE f.fid=%d", array($this->_table, 'forum_forumfield', $fid));
 			$this->store_cache($fid, $data);
 		}