diff --git a/rtp.h b/rtp.h
index fbbff766..de2f6d83 100644
--- a/rtp.h
+++ b/rtp.h
@@ -28,6 +28,7 @@ int local_time_to_frame(uint64_t time, uint32_t *frame, rtsp_conn_info *conn);
 int have_ptp_timing_information(rtsp_conn_info *conn);
 int get_ptp_anchor_local_time_info(rtsp_conn_info *conn, uint32_t *anchorRTP,
                                    uint64_t *anchorLocalTime);
+void reset_ptp_anchor_info(rtsp_conn_info *conn);
 void *rtp_ap2_control_receiver(void *arg);
 void *rtp_realtime_audio_receiver(void *arg);
 void *rtp_ap2_timing_receiver(void *arg);