Update copyrights
diff --git a/examples/cpp/helloworld/Makefile b/examples/cpp/helloworld/Makefile
index b785612..4b1867e 100644
--- a/examples/cpp/helloworld/Makefile
+++ b/examples/cpp/helloworld/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without