diff --git a/gst-libs/gst/rtp/gstbasertpdepayload.c b/gst-libs/gst/rtp/gstbasertpdepayload.c
index 920f0a966b..4dca0ca974 100644
--- a/gst-libs/gst/rtp/gstbasertpdepayload.c
+++ b/gst-libs/gst/rtp/gstbasertpdepayload.c
@@ -486,6 +486,9 @@ gst_base_rtp_depayload_push_full (GstBaseRTPDepayload * filter,
 
   priv = filter->priv;
 
+  /* almost certainly required */
+  out_buf = gst_buffer_make_metadata_writable (out_buf);
+
   /* set the caps if any */
   srccaps = GST_PAD_CAPS (filter->srcpad);
   if (G_LIKELY (srccaps))