diff --git a/include/boost/logic/tribool.hpp b/include/boost/logic/tribool.hpp
index 86b09a1..d1dee92 100644
--- a/include/boost/logic/tribool.hpp
+++ b/include/boost/logic/tribool.hpp
@@ -1,6 +1,6 @@
 // Three-state boolean logic library
 
-// Copyright Doug Gregor 2002-2004. Use, modification and
+// Copyright Douglas Gregor 2002-2004. Use, modification and
 // distribution is subject to the Boost Software License, Version
 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
diff --git a/include/boost/logic/tribool_fwd.hpp b/include/boost/logic/tribool_fwd.hpp
index 0c6d8af..2cdd91b 100644
--- a/include/boost/logic/tribool_fwd.hpp
+++ b/include/boost/logic/tribool_fwd.hpp
@@ -1,6 +1,6 @@
 // Three-state boolean logic library
 
-// Copyright Doug Gregor 2002-2004. Use, modification and
+// Copyright Douglas Gregor 2002-2004. Use, modification and
 // distribution is subject to the Boost Software License, Version
 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
diff --git a/include/boost/logic/tribool_io.hpp b/include/boost/logic/tribool_io.hpp
index d3936b5..a75146c 100644
--- a/include/boost/logic/tribool_io.hpp
+++ b/include/boost/logic/tribool_io.hpp
@@ -1,6 +1,6 @@
 // Three-state boolean logic library
 
-// Copyright Doug Gregor 2002-2003. Use, modification and
+// Copyright Douglas Gregor 2002-2004. Use, modification and
 // distribution is subject to the Boost Software License, Version
 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)