diff --git a/hdl/chisel/src/kelvin/scalar/Alu.scala b/hdl/chisel/src/kelvin/scalar/Alu.scala
index 2ac5855..3ce227d 100644
--- a/hdl/chisel/src/kelvin/scalar/Alu.scala
+++ b/hdl/chisel/src/kelvin/scalar/Alu.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Bru.scala b/hdl/chisel/src/kelvin/scalar/Bru.scala
index 02d7121..c6da8d1 100644
--- a/hdl/chisel/src/kelvin/scalar/Bru.scala
+++ b/hdl/chisel/src/kelvin/scalar/Bru.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Csr.scala b/hdl/chisel/src/kelvin/scalar/Csr.scala
index 7c78680..60b6ac6 100644
--- a/hdl/chisel/src/kelvin/scalar/Csr.scala
+++ b/hdl/chisel/src/kelvin/scalar/Csr.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Debug.scala b/hdl/chisel/src/kelvin/scalar/Debug.scala
index d7fedf3..e626266 100644
--- a/hdl/chisel/src/kelvin/scalar/Debug.scala
+++ b/hdl/chisel/src/kelvin/scalar/Debug.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Decode.scala b/hdl/chisel/src/kelvin/scalar/Decode.scala
index c7a7373..aab824f 100644
--- a/hdl/chisel/src/kelvin/scalar/Decode.scala
+++ b/hdl/chisel/src/kelvin/scalar/Decode.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Dvu.scala b/hdl/chisel/src/kelvin/scalar/Dvu.scala
index 8f117d1..5ae0353 100644
--- a/hdl/chisel/src/kelvin/scalar/Dvu.scala
+++ b/hdl/chisel/src/kelvin/scalar/Dvu.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Fetch.scala b/hdl/chisel/src/kelvin/scalar/Fetch.scala
index 0351317..5771e5f 100644
--- a/hdl/chisel/src/kelvin/scalar/Fetch.scala
+++ b/hdl/chisel/src/kelvin/scalar/Fetch.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Flush.scala b/hdl/chisel/src/kelvin/scalar/Flush.scala
index dddfcdf..65eeb11 100644
--- a/hdl/chisel/src/kelvin/scalar/Flush.scala
+++ b/hdl/chisel/src/kelvin/scalar/Flush.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Lsu.scala b/hdl/chisel/src/kelvin/scalar/Lsu.scala
index 7b6f82e..9a5ce8e 100644
--- a/hdl/chisel/src/kelvin/scalar/Lsu.scala
+++ b/hdl/chisel/src/kelvin/scalar/Lsu.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Mlu.scala b/hdl/chisel/src/kelvin/scalar/Mlu.scala
index 173909d..d302c88 100644
--- a/hdl/chisel/src/kelvin/scalar/Mlu.scala
+++ b/hdl/chisel/src/kelvin/scalar/Mlu.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/Regfile.scala b/hdl/chisel/src/kelvin/scalar/Regfile.scala
index 800aaac..cf17187 100644
--- a/hdl/chisel/src/kelvin/scalar/Regfile.scala
+++ b/hdl/chisel/src/kelvin/scalar/Regfile.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/SCore.scala b/hdl/chisel/src/kelvin/scalar/SCore.scala
index 786bbe6..90b953c 100644
--- a/hdl/chisel/src/kelvin/scalar/SCore.scala
+++ b/hdl/chisel/src/kelvin/scalar/SCore.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/scalar/SLog.scala b/hdl/chisel/src/kelvin/scalar/SLog.scala
index b52963a..3c3eca6 100644
--- a/hdl/chisel/src/kelvin/scalar/SLog.scala
+++ b/hdl/chisel/src/kelvin/scalar/SLog.scala
@@ -1,3 +1,4 @@
+// Copyright 2023 Google LLC
 package kelvin
 
 import chisel3._