diff --git a/internal/lsp/diagnostics.go b/internal/lsp/diagnostics.go
index 2ca622bbaa..c4dbb88ee1 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 07478bcf30..e547c6b702 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 a19def2acc..c78cf36a46 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 19400d68e6..77524d6a64 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 (