diff --git a/youtube_dl/extractor/yam.py b/youtube_dl/extractor/yam.py
index 9d851bae3..001ee17b6 100644
--- a/youtube_dl/extractor/yam.py
+++ b/youtube_dl/extractor/yam.py
@@ -14,6 +14,7 @@ from ..utils import (
 
 
 class YamIE(InfoExtractor):
+    IE_DESC = '蕃薯藤yam天空部落'
     _VALID_URL = r'http://mymedia.yam.com/m/(?P<id>\d+)'
 
     _TESTS = [{