diff --git a/samba-3.3.5-schannel_pipe.patch b/samba-3.3.5-schannel_pipe.patch
new file mode 100644
index 0000000..bec0751
--- /dev/null
+++ b/samba-3.3.5-schannel_pipe.patch
@@ -0,0 +1,36 @@
+From bc0dc5a452f52df76d3f6bbd119acd8476afe9d5 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?G=C3=BCnther=20Deschner?= <gd@samba.org>
+Date: Tue, 10 Nov 2009 13:10:12 +0100
+Subject: [PATCH] s3-rpc_client: make sure cli_rpc_pipe_open_schannel() does not always return NT_STATUS_OK.
+
+Guenther
+(cherry picked from commit d241b9ae4c9b520406aac98e24d078f2d4fd4ae5)
+---
+ source3/rpc_client/cli_pipe.c |    4 +++-
+ 1 files changed, 3 insertions(+), 1 deletions(-)
+
+diff --git a/source3/rpc_client/cli_pipe.c b/source3/rpc_client/cli_pipe.c
+index 9ff84f8..28d9d99 100644
+--- a/source3/rpc_client/cli_pipe.c
++++ b/source3/rpc_client/cli_pipe.c
+@@ -4123,6 +4123,8 @@ NTSTATUS cli_rpc_pipe_open_schannel(struct cli_state *cli,
+ 	struct rpc_pipe_client *result = NULL;
+ 	NTSTATUS status;
+ 
++	*presult = NULL;
++
+ 	status = get_schannel_session_key(cli, domain, &neg_flags,
+ 					  &netlogon_pipe);
+ 	if (!NT_STATUS_IS_OK(status)) {
+@@ -4143,7 +4145,7 @@ NTSTATUS cli_rpc_pipe_open_schannel(struct cli_state *cli,
+ 		*presult = result;
+ 	}
+ 
+-	return NT_STATUS_OK;
++	return status;
+ }
+ 
+ /****************************************************************************
+-- 
+1.6.5.2
+
diff --git a/samba.spec b/samba.spec
index ec819cc..ad526b7 100644
--- a/samba.spec
+++ b/samba.spec
@@ -1,4 +1,4 @@
-%define main_release 49
+%define main_release 50
 %define samba_version 3.4.3
 %define tdb_version 1.1.3
 %define talloc_version 1.3.0
@@ -45,6 +45,7 @@ Patch104: samba-3.0.0rc3-nmbd-netbiosname.patch
 # The passwd part has been applied, but not the group part
 Patch107: samba-3.2.0pre1-grouppwd.patch
 Patch200: samba-3.2.5-inotify.patch
+Patch201: samba-3.3.5-schannel_pipe.patch
 
 Requires(pre): samba-common = %{epoch}:%{samba_version}-%{release}
 Requires: pam >= 0:0.64
@@ -202,6 +203,7 @@ cp %{SOURCE11} packaging/Fedora/
 #%patch104 -p1 -b .nmbd-netbiosname # FIXME: does not apply
 %patch107 -p1 -b .grouppwd
 %patch200 -p0 -b .inotify
+%patch201 -p1 -b .schannel_pipe
 
 mv %samba_source/VERSION %samba_source/VERSION.orig
 sed -e 's/SAMBA_VERSION_VENDOR_SUFFIX=$/&\"%{samba_release}\"/' < %samba_source/VERSION.orig > %samba_source/VERSION
@@ -654,6 +656,10 @@ exit 0
 %{_datadir}/pixmaps/samba/logo-small.png
 
 %changelog
+* Tue Dec 01 2009 Guenther Deschner <gdeschner@redhat.com> - 3.4.3-50
+- Fix uninitialized rpc client pipe, causing winbind to crash
+- resolves: #541328
+
 * Wed Nov 25 2009 Guenther Deschner <gdeschner@redhat.com> - 3.4.3-49
 - Various updates to inline documentation in default smb.conf file
 - resolves: #483703