diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index fb94277c09..780a28aa0b 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -617,7 +617,7 @@ int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
         s->ctx_flags |= AVFMTCTX_NOHEADER;
 
     if (s->oformat && CONFIG_RTSP_MUXER) {
-        int ret = ff_rtp_chain_mux_open(&rtsp_st->transport_priv, s, st,
+        int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv, s, st,
                                         rtsp_st->rtp_handle,
                                         RTSP_TCP_MAX_PACKET_SIZE);
         /* Ownership of rtp_handle is passed to the rtp mux context */