--- a/gst-libs/gst/riff/riff-media.c
+++ b/gst-libs/gst/riff/riff-media.c
@@ -466,12 +466,18 @@
     case GST_MAKE_FOURCC ('F', 'M', 'P', '4'):
     case GST_MAKE_FOURCC ('U', 'M', 'P', '4'):
     case GST_MAKE_FOURCC ('F', 'F', 'D', 'S'):
+    {
+      gchar *fstr = g_strdup_printf ("%" GST_FOURCC_FORMAT,
+          GST_FOURCC_ARGS (codec_fcc));
       caps = gst_caps_new_simple ("video/mpeg",
           "mpegversion", G_TYPE_INT, 4,
           "systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
+      gst_caps_set_simple (caps, "fourcc", G_TYPE_STRING, fstr, NULL);
+      g_free (fstr);
       if (codec_name)
         *codec_name = g_strdup ("FFmpeg MPEG-4");
       break;
+    }
 
     case GST_MAKE_FOURCC ('3', 'I', 'V', '1'):
     case GST_MAKE_FOURCC ('3', 'I', 'V', '2'):