diff --git a/call/rtp_transport_controller_send.cc b/call/rtp_transport_controller_send.cc
index a414c3b425..ab95907ac8 100644
--- a/call/rtp_transport_controller_send.cc
+++ b/call/rtp_transport_controller_send.cc
@@ -400,7 +400,7 @@ void RtpTransportControllerSend::OnReceivedRtcpReceiverReport(
     report.receive_time = Timestamp::ms(now_ms);
     report.round_trip_time = TimeDelta::ms(rtt_ms);
     report.smoothed = false;
-    if (controller_)
+    if (controller_ && !report.round_trip_time.IsZero())
       PostUpdates(controller_->OnRoundTripTimeUpdate(report));
   });
 }
diff --git a/modules/congestion_controller/goog_cc/goog_cc_network_control.cc b/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
index 283ca983e9..e39d43f615 100644
--- a/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
+++ b/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
@@ -229,6 +229,7 @@ NetworkControlUpdate GoogCcNetworkController::OnRoundTripTimeUpdate(
     RoundTripTimeUpdate msg) {
   if (packet_feedback_only_ || msg.smoothed)
     return NetworkControlUpdate();
+  RTC_DCHECK(!msg.round_trip_time.IsZero());
   if (delay_based_bwe_)
     delay_based_bwe_->OnRttUpdate(msg.round_trip_time);
   bandwidth_estimation_->UpdateRtt(msg.round_trip_time, msg.receive_time);