diff --git a/youtube_dl/extractor/exfm.py b/youtube_dl/extractor/exfm.py
index f6e58cdc7..81c620531 100644
--- a/youtube_dl/extractor/exfm.py
+++ b/youtube_dl/extractor/exfm.py
@@ -1,4 +1,5 @@
 import re
+import json
 
 from .common import InfoExtractor