diff --git a/sys/v4l/v4l_calls.c b/sys/v4l/v4l_calls.c
index 0baf5ade1c..0a01265963 100644
--- a/sys/v4l/v4l_calls.c
+++ b/sys/v4l/v4l_calls.c
@@ -330,6 +330,11 @@ gst_v4l_get_chan_names (GstV4lElement * v4lelement)
             continue;           /* not this one */
           }
         }
+        /* FIXME: in the case of n >= vchan.tuners the code below accesses
+         * uninitialised fields in vtun
+         * Not sure if the codeblock below should go into the else above, but
+         * then setting vtun.tuner=0 is a bit pointless.
+         */
         v4lchannel->tuner = n;
         channel->flags |= GST_TUNER_CHANNEL_FREQUENCY;
         channel->freq_multiplicator =