diff --git a/examples/protos/helloworld.proto b/examples/protos/helloworld.proto
index ad3ad3aa507b1e8e951d0cd0c46fbe38e09d5aee..e670503b09e55fbde93f1d9bef5a762c9b1c1839 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 f0231b7e4206b34959375a7f57ac2b6d9bcbf136..b3553ee536614a1d13ff5208dba6cede26e272fe 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