diff --git a/src/Rtsp/RtspMediaSource.h b/src/Rtsp/RtspMediaSource.h
index 4cdaf125..bdc6b637 100644
--- a/src/Rtsp/RtspMediaSource.h
+++ b/src/Rtsp/RtspMediaSource.h
@@ -92,7 +92,7 @@ public:
 		return track->_time_stamp;
 	}
 
-	void setTimeStamp(uint32_t uiStamp) {
+	virtual void setTimeStamp(uint32_t uiStamp) {
 		auto tracks = _sdpAttr.getAvailableTrack();
 		for (auto &track : tracks) {
 			track->_time_stamp  = uiStamp;