diff --git a/mozilla-build-s390.patch b/mozilla-build-s390.patch
index efdc54e..2bfe1d5 100644
--- a/mozilla-build-s390.patch
+++ b/mozilla-build-s390.patch
@@ -1,8 +1,8 @@
-diff -up mozilla/js/src/jstl.h.old mozilla/js/src/jstl.h
---- mozilla/js/src/jstl.h.old	2010-03-10 10:01:51.000000000 +0100
-+++ mozilla/js/src/jstl.h	2010-03-10 12:24:55.000000000 +0100
+diff -up mozilla-1.9.2/js/src/jstl.h.s390 mozilla-1.9.2/js/src/jstl.h
+--- mozilla-1.9.2/js/src/jstl.h.s390	2011-02-18 19:33:24.000000000 +0100
++++ mozilla-1.9.2/js/src/jstl.h	2011-03-07 08:41:29.000000000 +0100
 @@ -195,7 +195,6 @@ class ReentrancyGuard
- static JS_ALWAYS_INLINE size_t
+ JS_ALWAYS_INLINE size_t
  RoundUpPow2(size_t x)
  {
 -    typedef tl::StaticAssert<tl::IsSameType<size_t,JSUword>::result>::result _;
diff --git a/thunderbird.spec b/thunderbird.spec
index bfb2af3..231ceb8 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -31,7 +31,7 @@
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
 Version:        %{thunderbird_version}
-Release:        3%{?dist}
+Release:        4%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
@@ -388,6 +388,9 @@ fi
 #===============================================================================
 
 %changelog
+* Sun Mar 20 2011 Dan Horák <dan[at]danny.cz> - 3.1.9-4
+- updated the s390 build patch
+
 * Fri Mar 18 2011 Jan Horak <jhorak@redhat.com> - 3.1.9-3
 - Removed gnome-vfs2, libgnomeui and libgnome from build requires