diff --git a/video/report_block_stats.cc b/video/report_block_stats.cc
index e11568eeaf..332709e37e 100644
--- a/video/report_block_stats.cc
+++ b/video/report_block_stats.cc
@@ -10,6 +10,8 @@
 
 #include "video/report_block_stats.h"
 
+#include <algorithm>
+
 namespace webrtc {
 
 namespace {
@@ -33,7 +35,8 @@ void ReportBlockStats::Store(const RtcpStatistics& rtcp_stats,
                              uint32_t remote_ssrc,
                              uint32_t source_ssrc) {
   RTCPReportBlock block;
-  block.packets_lost = rtcp_stats.packets_lost;
+  // TODO(srte): Remove this clamp when packets_lost is made signed.
+  block.packets_lost = std::max(0, rtcp_stats.packets_lost);
   block.fraction_lost = rtcp_stats.fraction_lost;
   block.extended_highest_sequence_number =
       rtcp_stats.extended_highest_sequence_number;