diff --git a/youtube_dl/extractor/fxnetworks.py b/youtube_dl/extractor/fxnetworks.py
index 35bc4283b..0a0bc60f0 100644
--- a/youtube_dl/extractor/fxnetworks.py
+++ b/youtube_dl/extractor/fxnetworks.py
@@ -7,6 +7,7 @@ from ..utils import (
     extract_attributes,
     parse_age_limit,
     smuggle_url,
+    int_or_none,
 )