diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 23489ca1f..4571a2c08 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2010-01-29  Corinna Vinschen  <corinna@vinschen.de>
+
+	* sec_auth.cc (lsaauth): Use CYG_LSA_MAGIC as checksum start value to
+	decouple from Cygwin release.
+
 2010-01-29  Corinna Vinschen  <corinna@vinschen.de>
 
 	* libc/strfmon.c (__setup_vars): Test for an empty string rather than
diff --git a/winsup/cygwin/sec_auth.cc b/winsup/cygwin/sec_auth.cc
index 6e4e72123..2a557a532 100644
--- a/winsup/cygwin/sec_auth.cc
+++ b/winsup/cygwin/sec_auth.cc
@@ -1053,8 +1053,7 @@ lsaauth (cygsid &usersid, user_groups &new_groups, struct passwd *pw)
   authinf->inf.DefaultDacl.DefaultDacl = offset;
   memcpy ((PBYTE) &authinf->inf + offset, dacl, dsize);
 
-  authinf->checksum = CYGWIN_VERSION_MAGIC (CYGWIN_VERSION_DLL_MAJOR,
-					    CYGWIN_VERSION_DLL_MINOR);
+  authinf->checksum = CYG_LSA_MAGIC;
   PDWORD csp;
   PDWORD csp_end;
   csp = (PDWORD) &authinf->username;