diff --git a/words.h b/words.h
index 79f61f49..6e5dfb00 100644
--- a/words.h
+++ b/words.h
@@ -1,3 +1,8 @@
+// words.h - originally written and placed in the public domain by Wei Dai
+
+/// \file words.h
+/// \brief Support functions for word operations
+
 #ifndef CRYPTOPP_WORDS_H
 #define CRYPTOPP_WORDS_H
 
diff --git a/zinflate.h b/zinflate.h
index b35071e5..bebc0fdf 100644
--- a/zinflate.h
+++ b/zinflate.h
@@ -1,3 +1,8 @@
+// zinflate.h - originally written and placed in the public domain by Wei Dai
+
+/// \file zinflate.h
+/// \brief DEFLATE compression and decompression (RFC 1951)
+
 #ifndef CRYPTOPP_ZINFLATE_H
 #define CRYPTOPP_ZINFLATE_H
 
diff --git a/zlib.h b/zlib.h
index ef10856f..a330eeb8 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1,3 +1,8 @@
+// zlib.h - originally written and placed in the public domain by Wei Dai
+
+/// \file zlib.h
+/// \brief ZLIB compression and decompression (RFC 1950)
+
 #ifndef CRYPTOPP_ZLIB_H
 #define CRYPTOPP_ZLIB_H