diff --git a/sys/androidmedia/gstamcaudiodec.c b/sys/androidmedia/gstamcaudiodec.c
index 0b9891cf69..3d71f9a13d 100644
--- a/sys/androidmedia/gstamcaudiodec.c
+++ b/sys/androidmedia/gstamcaudiodec.c
@@ -444,7 +444,8 @@ gst_amc_audio_dec_set_src_caps (GstAmcAudioDec * self, GstAmcFormat * format)
   }
 
   /* Not always present */
-  gst_amc_format_get_int (format, "channel-mask", (gint *) & channel_mask);
+  if (gst_amc_format_contains_key (format, "channel-mask"))
+    gst_amc_format_get_int (format, "channel-mask", (gint *) & channel_mask);
 
   if (self->positions)
     g_free (self->positions);