diff --git a/convert_lrc.py b/convert_lrc.py
index bb27bdd..33d714d 100644
--- a/convert_lrc.py
+++ b/convert_lrc.py
@@ -8,6 +8,7 @@ try:
     from _rssbotlib import AVDict, version, VideoInfo
     have_rssbotlib = True
 except ImportError:
+    AVDict = None
     have_rssbotlib = False