diff --git a/include/cdio/version.h.in b/include/cdio/version.h.in
index 2727cdd2..54e1c063 100644
--- a/include/cdio/version.h.in
+++ b/include/cdio/version.h.in
@@ -1,9 +1,10 @@
-/* $Id: version.h.in,v 1.3 2004/03/20 12:41:23 rocky Exp $ */
+/* $Id: version.h.in,v 1.4 2004/03/20 12:43:13 rocky Exp $ */
 /** \file version.h 
  *  \brief  A file simply containing the library version number.
  */
 
+/*! CDIO_VERSION can as a string in programs to show what version is used. */
 #define CDIO_VERSION "@VERSION@"
 
-/* This can be used for testing in the C preprocessor */
+/*! LIBCDIO_VERSION_NUM  can be used for testing in the C preprocessor */
 #define LIBCDIO_VERSION_NUM @LIBCDIO_VERSION_NUM@