diff --git a/libcelt/cwrs.c b/libcelt/cwrs.c
index 3ec3b84a..434d1ace 100644
--- a/libcelt/cwrs.c
+++ b/libcelt/cwrs.c
@@ -1,4 +1,5 @@
-/* (C) 2007 Timothy B. Terriberry */
+/* (C) 2007 Timothy B. Terriberry
+   (C) 2008 Jean-Marc Valin */
 /*
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
@@ -27,6 +28,10 @@
    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
+
+/* Functions for encoding and decoding pulse vectors. For more details, see:
+   http://people.xiph.org/~tterribe/notes/cwrs.html
+*/
 #include <stdlib.h>
 #include "cwrs.h"