diff --git a/api/video/video_codec_constants.h b/api/video/video_codec_constants.h
index e4e4b0fc96..6b6feee4cb 100644
--- a/api/video/video_codec_constants.h
+++ b/api/video/video_codec_constants.h
@@ -14,7 +14,7 @@
 namespace webrtc {
 
 enum : int { kMaxEncoderBuffers = 8 };
-enum : int { kMaxSimulcastStreams = 4 };
+enum : int { kMaxSimulcastStreams = 3 };
 enum : int { kMaxSpatialLayers = 5 };
 enum : int { kMaxTemporalStreams = 4 };
 
diff --git a/pc/peer_connection_simulcast_unittest.cc b/pc/peer_connection_simulcast_unittest.cc
index 4b1f09b81c..cb36bb133f 100644
--- a/pc/peer_connection_simulcast_unittest.cc
+++ b/pc/peer_connection_simulcast_unittest.cc
@@ -406,8 +406,8 @@ TEST_F(PeerConnectionSimulcastTests, SimulcastRejectedRemovesExtraLayers) {
 TEST_F(PeerConnectionSimulcastTests, RejectedSimulcastLayersAreDeactivated) {
   auto local = CreatePeerConnectionWrapper();
   auto remote = CreatePeerConnectionWrapper();
-  auto layers = CreateLayers({"1", "2", "3", "4"}, true);
-  auto expected_layers = CreateLayers({"2", "3", "4"}, true);
+  auto layers = CreateLayers({"1", "2", "3"}, true);
+  auto expected_layers = CreateLayers({"2", "3"}, true);
   auto transceiver = AddTransceiver(local.get(), layers);
   auto offer = local->CreateOfferAndSetAsLocal();
   {