diff --git a/gst-libs/gst/riff/riff-media.c b/gst-libs/gst/riff/riff-media.c
index ef617e1080..eeb6fd6312 100644
--- a/gst-libs/gst/riff/riff-media.c
+++ b/gst-libs/gst/riff/riff-media.c
@@ -233,8 +233,9 @@ gst_riff_create_audio_caps (guint16             codec_id,
 
     case GST_RIFF_WAVE_FORMAT_MPEGL12: /* mp1 or mp2 */
       caps = GST_CAPS_NEW ("riff_audio_mp1l12",
-				   "audio/mpeg",
-				     "layer", GST_PROPS_INT (2));
+			   "audio/mpeg",
+			     "mpegversion", GST_PROPS_INT (1),
+			     "layer", GST_PROPS_INT (2));
       break;
 
     case GST_RIFF_WAVE_FORMAT_PCM: /* PCM/wav */ {
diff --git a/gst/asfdemux/gstasfdemux.c b/gst/asfdemux/gstasfdemux.c
index 4fe057d52e..578c90bf05 100644
--- a/gst/asfdemux/gstasfdemux.c
+++ b/gst/asfdemux/gstasfdemux.c
@@ -1257,12 +1257,14 @@ gst_asf_demux_audio_caps (guint16 codec_id,
     case GST_RIFF_WAVE_FORMAT_MPEGL3: /* mp3 */
       caps = GST_ASF_AUD_CAPS_NEW ("asf_demux_audio_src_mp3",
 				   "audio/mpeg",
+				     "mpegversion", GST_PROPS_INT (1),
 				     "layer", GST_PROPS_INT (3));
       break;
 
     case GST_RIFF_WAVE_FORMAT_MPEGL12: /* mp1 or mp2 */
       caps = GST_ASF_AUD_CAPS_NEW ("asf_demux_audio_src_mp12",
 				   "audio/mpeg",
+				     "mpegversion", GST_PROPS_INT (1),
 				     "layer", GST_PROPS_INT (2));
       break;
 
diff --git a/gst/asfdemux/gstasfmux.c b/gst/asfdemux/gstasfmux.c
index 3b073e2b5a..b95d160c5d 100644
--- a/gst/asfdemux/gstasfmux.c
+++ b/gst/asfdemux/gstasfmux.c
@@ -183,6 +183,7 @@ GST_PAD_TEMPLATE_FACTORY (audio_sink_factory,
   GST_CAPS_NEW (
     "asfmux_sink_audio_mpeg",
     "audio/mpeg",
+      "mpegversion",      GST_PROPS_INT (1),
       "layer",		  GST_PROPS_INT_RANGE (1, 3),
       "rate",             GST_PROPS_INT_RANGE (1000, 96000),
       "channels",         GST_PROPS_INT_RANGE (1, 2)
diff --git a/gst/mpegstream/gstmpegdemux.c b/gst/mpegstream/gstmpegdemux.c
index 8042c29edb..9c24587204 100644
--- a/gst/mpegstream/gstmpegdemux.c
+++ b/gst/mpegstream/gstmpegdemux.c
@@ -67,7 +67,8 @@ GST_PAD_TEMPLATE_FACTORY (audio_factory,
   GST_CAPS_NEW (
     "mpeg_demux_audio",
     "audio/mpeg",
-      NULL
+      "mpegversion", GST_PROPS_INT (1),
+      "layer", GST_PROPS_INT_RANGE (1, 2)
   )
 );