diff --git a/gst/isomp4/fourcc.h b/gst/isomp4/fourcc.h
index 51405bb0fd..4516abca39 100644
--- a/gst/isomp4/fourcc.h
+++ b/gst/isomp4/fourcc.h
@@ -177,6 +177,7 @@ G_BEGIN_DECLS
 #define FOURCC_mhlr     GST_MAKE_FOURCC('m','h','l','r')
 #define FOURCC_minf     GST_MAKE_FOURCC('m','i','n','f')
 #define FOURCC_moov     GST_MAKE_FOURCC('m','o','o','v')
+#define FOURCC_mp3_     GST_MAKE_FOURCC('m','p','3',' ')
 #define FOURCC_mp4a     GST_MAKE_FOURCC('m','p','4','a')
 #define FOURCC_mp4s     GST_MAKE_FOURCC('m','p','4','s')
 #define FOURCC_mp4s     GST_MAKE_FOURCC('m','p','4','s')
diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
index a342b01fc6..6f5eb6070f 100644
--- a/gst/isomp4/qtdemux.c
+++ b/gst/isomp4/qtdemux.c
@@ -15772,6 +15772,7 @@ qtdemux_audio_caps (GstQTDemux * qtdemux, QtDemuxStream * stream,
     case 0x6d730055:
       /* MPEG layer 3, CBR only (pre QT4.1) */
     case FOURCC__mp3:
+    case FOURCC_mp3_:
       _codec ("MPEG-1 layer 3");
       /* MPEG layer 3, CBR & VBR (QT4.1 and later) */
       caps = gst_caps_new_simple ("audio/mpeg", "layer", G_TYPE_INT, 3,