diff --git a/internal/lsp/diagnostics.go b/internal/lsp/diagnostics.go
index 2ca622bb..c4dbb88e 100644
--- a/internal/lsp/diagnostics.go
+++ b/internal/lsp/diagnostics.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package lsp
 
 import (
diff --git a/internal/lsp/diagnostics_test.go b/internal/lsp/diagnostics_test.go
index 07478bcf..e547c6b7 100644
--- a/internal/lsp/diagnostics_test.go
+++ b/internal/lsp/diagnostics_test.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package lsp
 
 import (
diff --git a/internal/lsp/format.go b/internal/lsp/format.go
index a19def2a..c78cf36a 100644
--- a/internal/lsp/format.go
+++ b/internal/lsp/format.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package lsp
 
 import (
diff --git a/internal/lsp/view.go b/internal/lsp/view.go
index 19400d68..77524d6a 100644
--- a/internal/lsp/view.go
+++ b/internal/lsp/view.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package lsp
 
 import (