diff --git a/webrtc/test/rtp_rtcp_observer.h b/webrtc/test/rtp_rtcp_observer.h
index 39b43c0e0e..90e7b98242 100644
--- a/webrtc/test/rtp_rtcp_observer.h
+++ b/webrtc/test/rtp_rtcp_observer.h
@@ -65,6 +65,7 @@ class RtpRtcpObserver {
   explicit RtpRtcpObserver(unsigned int event_timeout_ms)
       : lock_(CriticalSectionWrapper::CreateCriticalSection()),
         observation_complete_(EventWrapper::Create()),
+        parser_(RtpHeaderParser::Create()),
         send_transport_(lock_.get(),
                         this,
                         &RtpRtcpObserver::OnSendRtp,