diff --git a/ffplayout.conf b/ffplayout.conf
index 2b228f51..6dd26c72 100644
--- a/ffplayout.conf
+++ b/ffplayout.conf
@@ -73,6 +73,7 @@ day_start = 6
 # without interrupt the stream
 
 # buffer_length: length in seconds of the buffer
+# (this is not accurate at the moment, the real length is maybe match more)
 # this is the time what the playout have, to change from one clip to the next
 # be liberal with this value but dont exaggerate
 # buffer size gets calculate with: (v_bitrate + a_bitrate) * buffer_length