diff --git a/common_types.h b/common_types.h
index f15fb9e65e..21fdf56fe0 100644
--- a/common_types.h
+++ b/common_types.h
@@ -104,7 +104,7 @@ struct RtcpStatistics {
 
   uint8_t fraction_lost;
   union {
-    uint32_t packets_lost;
+    int32_t packets_lost;  // Defined as a 24 bit signed integer in RTCP
     RTC_DEPRECATED uint32_t cumulative_lost;
   };
   union {
diff --git a/modules/rtp_rtcp/source/receive_statistics_unittest.cc b/modules/rtp_rtcp/source/receive_statistics_unittest.cc
index a832383310..034be7dfee 100644
--- a/modules/rtp_rtcp/source/receive_statistics_unittest.cc
+++ b/modules/rtp_rtcp/source/receive_statistics_unittest.cc
@@ -195,7 +195,7 @@ TEST_F(ReceiveStatisticsTest, RtcpCallbacks) {
   EXPECT_EQ(statistics.fraction_lost, callback.stats_.fraction_lost);
   EXPECT_EQ(statistics.jitter, callback.stats_.jitter);
   EXPECT_EQ(51, statistics.fraction_lost);
-  EXPECT_EQ(1u, statistics.packets_lost);
+  EXPECT_EQ(1, statistics.packets_lost);
   EXPECT_EQ(5u, statistics.extended_highest_sequence_number);
   EXPECT_EQ(4u, statistics.jitter);
 
diff --git a/video/receive_statistics_proxy_unittest.cc b/video/receive_statistics_proxy_unittest.cc
index 44fdc8bd15..1d844bc964 100644
--- a/video/receive_statistics_proxy_unittest.cc
+++ b/video/receive_statistics_proxy_unittest.cc
@@ -294,7 +294,7 @@ TEST_F(ReceiveStatisticsProxyTest, GetStatsReportsDiscardedPackets) {
 
 TEST_F(ReceiveStatisticsProxyTest, GetStatsReportsRtcpStats) {
   const uint8_t kFracLost = 0;
-  const uint32_t kCumLost = 1;
+  const int32_t kCumLost = 1;
   const uint32_t kExtSeqNum = 10;
   const uint32_t kJitter = 4;