diff --git a/magick/thread_.h b/magick/thread_.h
index 8b7ab5c..5db1eeb 100644
--- a/magick/thread_.h
+++ b/magick/thread_.h
@@ -1,5 +1,5 @@
 /*
-  Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization
+  Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization
   dedicated to making software imaging solutions freely available.
 
   You may not use this file except in compliance with the License.