diff --git a/api/audio_codecs/opus/audio_encoder_multi_channel_opus_config.cc b/api/audio_codecs/opus/audio_encoder_multi_channel_opus_config.cc
index f01caf1..0052c42 100644
--- a/api/audio_codecs/opus/audio_encoder_multi_channel_opus_config.cc
+++ b/api/audio_codecs/opus/audio_encoder_multi_channel_opus_config.cc
@@ -38,7 +38,7 @@
 bool AudioEncoderMultiChannelOpusConfig::IsOk() const {
   if (frame_size_ms <= 0 || frame_size_ms % 10 != 0)
     return false;
-  if (num_channels < 0 || num_channels >= 255) {
+  if (num_channels >= 255) {
     return false;
   }
   if (bitrate_bps < kMinBitrateBps || bitrate_bps > kMaxBitrateBps)
@@ -47,7 +47,7 @@
     return false;
 
   // Check the lengths:
-  if (num_channels < 0 || num_streams < 0 || coupled_streams < 0) {
+  if (num_streams < 0 || coupled_streams < 0) {
     return false;
   }
   if (num_streams < coupled_streams) {
diff --git a/api/audio_codecs/opus/audio_encoder_opus_config.cc b/api/audio_codecs/opus/audio_encoder_opus_config.cc
index 2f36d02..0e6f55e 100644
--- a/api/audio_codecs/opus/audio_encoder_opus_config.cc
+++ b/api/audio_codecs/opus/audio_encoder_opus_config.cc
@@ -61,7 +61,7 @@
     // well; we can add support for them when needed.)
     return false;
   }
-  if (num_channels < 0 || num_channels >= 255) {
+  if (num_channels >= 255) {
     return false;
   }
   if (!bitrate_bps)
diff --git a/modules/rtp_rtcp/source/rtp_packet_history.cc b/modules/rtp_rtcp/source/rtp_packet_history.cc
index 1fbfb76..5089933 100644
--- a/modules/rtp_rtcp/source/rtp_packet_history.cc
+++ b/modules/rtp_rtcp/source/rtp_packet_history.cc
@@ -134,7 +134,7 @@
   // Store packet.
   const uint16_t rtp_seq_no = packet->SequenceNumber();
   int packet_index = GetPacketIndex(rtp_seq_no);
-  if (packet_index >= 0u &&
+  if (packet_index >= 0 &&
       static_cast<size_t>(packet_index) < packet_history_.size() &&
       packet_history_[packet_index].packet_ != nullptr) {
     RTC_LOG(LS_WARNING) << "Duplicate packet inserted: " << rtp_seq_no;
diff --git a/modules/rtp_rtcp/source/rtp_video_layers_allocation_extension.cc b/modules/rtp_rtcp/source/rtp_video_layers_allocation_extension.cc
index be6aadb..93fb235 100644
--- a/modules/rtp_rtcp/source/rtp_video_layers_allocation_extension.cc
+++ b/modules/rtp_rtcp/source/rtp_video_layers_allocation_extension.cc
@@ -110,8 +110,7 @@
       if (spatial_layer.height <= 0) {
         return false;
       }
-      if (spatial_layer.frame_rate_fps < 0 ||
-          spatial_layer.frame_rate_fps > 255) {
+      if (spatial_layer.frame_rate_fps > 255) {
         return false;
       }
     }