diff --git a/python_apps/media-monitor2/media/monitor/metadata.py b/python_apps/media-monitor2/media/monitor/metadata.py
index 5bbbafaeb..d5dba3b51 100644
--- a/python_apps/media-monitor2/media/monitor/metadata.py
+++ b/python_apps/media-monitor2/media/monitor/metadata.py
@@ -114,6 +114,7 @@ class Metadata(Loggable):
             if airtime_k in airtime2mutagen:
                 # The unicode cast here is mostly for integers that need to be
                 # strings
+                if airtime_v is None: continue
                 try:
                     song_file[ airtime2mutagen[airtime_k] ] = unicode(airtime_v)
                 except (EasyMP4KeyError, EasyID3KeyError) as e: