diff --git a/examples/protos/helloworld.proto b/examples/protos/helloworld.proto
index ad3ad3aa507b1..e670503b09e55 100644
--- a/examples/protos/helloworld.proto
+++ b/examples/protos/helloworld.proto
@@ -1,4 +1,4 @@
-// Copyright 2016, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/examples/protos/route_guide.proto b/examples/protos/route_guide.proto
index f0231b7e4206b..b3553ee536614 100644
--- a/examples/protos/route_guide.proto
+++ b/examples/protos/route_guide.proto
@@ -1,4 +1,4 @@
-// Copyright 2016, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without