diff --git a/gst-libs/gst/rtp/gstrtpbuffer.c b/gst-libs/gst/rtp/gstrtpbuffer.c
index 51b323ee15..a61051e819 100644
--- a/gst-libs/gst/rtp/gstrtpbuffer.c
+++ b/gst-libs/gst/rtp/gstrtpbuffer.c
@@ -791,7 +791,7 @@ ensure_buffers (GstRTPBuffer * rtp)
 
     gst_rtp_buffer_unmap (rtp);
     gst_buffer_remove_memory_range (buf, pos, -1);
-    gst_rtp_buffer_map (rtp->buffer, GST_MAP_READWRITE, rtp);
+    gst_rtp_buffer_map (buf, GST_MAP_READWRITE, rtp);
   }
 }