diff --git a/gst/mxf/mxfmpeg.c b/gst/mxf/mxfmpeg.c
index 996199af0f..0865577c47 100644
--- a/gst/mxf/mxfmpeg.c
+++ b/gst/mxf/mxfmpeg.c
@@ -577,7 +577,7 @@ mxf_mpeg_es_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
       codec_name = "MPEG-1 Audio";
     } else if (mxf_ul_is_equal (&s->sound_essence_compression,
             &sound_essence_compression_ac3)) {
-      caps = gst_caps_new_simple ("audio/ac3", NULL);
+      caps = gst_caps_new_simple ("audio/x-ac3", NULL);
       codec_name = "AC3 Audio";
     } else if (mxf_ul_is_equal (&s->sound_essence_compression,
             &sound_essence_compression_mpeg1_layer1)) {