diff --git a/gst/isomp4/gstqtmuxmap.c b/gst/isomp4/gstqtmuxmap.c
index 2795e97db2..b739a7c8be 100644
--- a/gst/isomp4/gstqtmuxmap.c
+++ b/gst/isomp4/gstqtmuxmap.c
@@ -167,6 +167,7 @@ GstQTMuxFormatProp gst_qt_mux_format_list[] = {
             AAC_CAPS " ; "
             ADPCM_CAPS " ; "
             "audio/x-alaw, " COMMON_AUDIO_CAPS (2, MAX) "; "
+            "audio/x-mulaw, " COMMON_AUDIO_CAPS (2, MAX) "; "
             AMR_CAPS " ; " ALAC_CAPS)
       }
   ,