diff --git a/youtube_dl/extractor/mit.py b/youtube_dl/extractor/mit.py
index 06d331bbc..270fdf04b 100644
--- a/youtube_dl/extractor/mit.py
+++ b/youtube_dl/extractor/mit.py
@@ -8,6 +8,7 @@ from .youtube import YoutubeIE
 from ..utils import (
     compat_urlparse,
     clean_html,
+    ExtractorError,
     get_element_by_id,
 )