diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index f622520a3..38789fb75 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2006-12-13  Corinna Vinschen  <corinna@vinschen.de>
+
+	* security.cc (lsaauth): Initialize lsa to INVALID_HANDLE_VALUE to
+	avoid potential access violation.
+
 2006-12-12  Corinna Vinschen  <corinna@vinschen.de>
 
 	* environ.cc (subauth_id_init): Remove.
diff --git a/winsup/cygwin/security.cc b/winsup/cygwin/security.cc
index 67a3ed2d0..3aa658958 100644
--- a/winsup/cygwin/security.cc
+++ b/winsup/cygwin/security.cc
@@ -944,7 +944,7 @@ lsaauth (cygsid &usersid, user_groups &new_groups, struct passwd *pw)
   cygsidlist tmp_gsids (cygsidlist_auto, 12);
   cygpsid pgrpsid;
   LSA_STRING name;
-  HANDLE lsa_hdl = NULL, lsa;
+  HANDLE lsa_hdl = NULL, lsa = INVALID_HANDLE_VALUE;
   LSA_OPERATIONAL_MODE sec_mode;
   NTSTATUS ret, ret2;
   ULONG package_id, size;