diff --git a/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c b/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c
index 41c659c881..8def7cf0a6 100644
--- a/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c
+++ b/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c
@@ -4432,7 +4432,7 @@ _create_pad_for_sdp_media (GstWebRTCBin * webrtc, GstPadDirection direction,
     if (serial == G_MAXUINT)
       serial = webrtc->priv->max_sink_pad_serial++;
   } else {
-    serial = trans->mline;
+    serial = webrtc->priv->src_pad_counter++;
   }
 
   pad_name =
diff --git a/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.h b/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.h
index b80a54ad67..232bb451eb 100644
--- a/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.h
+++ b/subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.h
@@ -95,6 +95,7 @@ struct _GstWebRTCBinClass
 struct _GstWebRTCBinPrivate
 {
   guint max_sink_pad_serial;
+  guint src_pad_counter;
 
   gboolean bundle;
   GPtrArray *transceivers;