diff --git a/src/you_get/json_output.py b/src/you_get/json_output.py
index 2c9950ae..d447ea2f 100644
--- a/src/you_get/json_output.py
+++ b/src/you_get/json_output.py
@@ -17,9 +17,9 @@ def output(video_extractor, pretty_print=True):
     except AttributeError:
         pass
     extra = {}
-    if ve.referer is not None:
+    if getattr(ve, 'referer', None) is not None:
         extra["referer"] = ve.referer
-    if ve.ua is not None:
+    if getattr(ve, 'ua', None) is not None:
         extra["ua"] = ve.ua
     if extra:
         out["extra"] = extra