diff --git a/oxgst/info.py b/oxgst/info.py
index 9012513..cfe0b52 100644
--- a/oxgst/info.py
+++ b/oxgst/info.py
@@ -44,7 +44,8 @@ class Info(dict):
                     #self['sample width (bits)'] = d.audiowidth
                     #self['sample depth (bits)'] = d.audiodepth
                     self['samplerate'] = d.audiorate
-                    self['duration'] = max(self.get('duration', 0), d.audiolength/gst.MSECOND)
+                    if 'duration' not in self:
+                        self['duration'] = d.audiolength/gst.MSECOND
                     self['channels'] = d.audiochannels
 
                 if 'video-codec' in d.tags: