diff --git a/AUTHORS b/AUTHORS
index 68628285..8c663bc4 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -28,6 +28,7 @@ Geoffrey McRae <geoff@spacevs.com>
 Piotr Grzybowski <narsil.pl@gmail.com>
 Gerrit Telkamp <g.telkamp@domologic.de>
 Erik Slagter <erik@slagter.name>
+Andreas Wehrmann <a.wehrmann@centersystems.com>
 
 Documentation contributions also came from:
 Marco Maggi <marco.maggi-ipsu@poste.it>
diff --git a/ChangeLog b/ChangeLog
index bfc0af83..c9847cbc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jan 18 23:58:09 CET 2011
+	Fixing hash calculation in digest auth; old function had
+	collisions causing the browser to challenge users for
+	authentication too often. -CG/AW
+
 Fri Jan 14 19:19:45 CET 2011
 	Removing dead code, adding missing new symbols to export list.
 	Fixed two missing NULL checks after malloc operations. -CG
diff --git a/src/daemon/digestauth.c b/src/daemon/digestauth.c
index 72bff56f..4415902b 100644
--- a/src/daemon/digestauth.c
+++ b/src/daemon/digestauth.c
@@ -310,7 +310,7 @@ check_nonce_nc (struct MHD_Connection *connection,
   np = nonce;
   while (*np != '\0')
     {
-      off = (off << 8) | (*np & (off >> 24));
+      off = (off << 8) | (*np ^ (off >> 24));
       np++;
     }
   off = off % mod;