diff --git a/sed-4.2.1-data-loss.patch b/sed-4.2.1-data-loss.patch
new file mode 100644
index 0000000..73161cb
--- /dev/null
+++ b/sed-4.2.1-data-loss.patch
@@ -0,0 +1,58 @@
+From 695e76c32320a6cf641bc91c077ded01c6da0315 Mon Sep 17 00:00:00 2001
+From: "Vojtech Vitek (V-Teq)" <vvitek@redhat.com>
+Date: Tue, 12 Jul 2011 15:37:12 +0200
+Subject: [PATCH] avoid silent data loss when an input line is 2^31 bytes or
+ longer
+
+If one line in a file has length (including newline) of 2^31, then
+applying sed -i to that file truncates it to size 0.  I first
+noticed it like this: Create a file with line of length 2^31-1
+  $ perl -le 'print "v"x(2**31-1)' > k
+Then prepend a byte to that line:
+  $ sed -i 's/^/v/' k
+Surprise!  The file is empty.
+* sed/utils.c (ck_getline): Declare "result" to be of type ssize_t,
+rather than int, to match the return type of getline.
+
+Upstream 81ce070727b225a1e23e5a48f775811c8a9e7366
+by Jim Meyering <meyering@redhat.com>
+---
+ NEWS        |    4 ++++
+ sed/utils.c |    4 ++--
+ 2 files changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/NEWS b/NEWS
+index cd755d2..91d7c15 100644
+--- a/NEWS
++++ b/NEWS
+@@ -1,3 +1,7 @@
++Patches from Sed 4.2.2
++
++* don't misbehave (truncate input) for lines of length 2^31 and longer
++
+ Sed 4.2.1
+ 
+ * fix parsing of s/[[[[[[[[[]//
+diff --git a/sed/utils.c b/sed/utils.c
+index 82b53a6..c416d59 100644
+--- a/sed/utils.c
++++ b/sed/utils.c
+@@ -1,5 +1,5 @@
+ /*  Functions from hack's utils library.
+-    Copyright (C) 1989, 1990, 1991, 1998, 1999, 2003, 2008, 2009
++    Copyright (C) 1989, 1990, 1991, 1998, 1999, 2003, 2008, 2009, 2011
+     Free Software Foundation, Inc.
+ 
+     This program is free software; you can redistribute it and/or modify
+@@ -269,7 +269,7 @@ ck_getline(text, buflen, stream)
+   size_t *buflen;
+   FILE *stream;
+ {
+-  int result;
++  ssize_t result;
+   if (!ferror (stream))
+     result = getline (text, buflen, stream);
+ 
+-- 
+1.7.5.4
+
diff --git a/sed.spec b/sed.spec
index a970520..5ad2631 100644
--- a/sed.spec
+++ b/sed.spec
@@ -14,6 +14,7 @@ Source0: ftp://ftp.gnu.org/pub/gnu/sed/sed-%{version}.tar.bz2
 Source1: http://sed.sourceforge.net/sedfaq.txt
 Patch0: sed-4.2.1-copy.patch
 Patch1: sed-4.2.1-makecheck.patch
+Patch2: sed-4.2.1-data-loss.patch
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: glibc-devel, libselinux-devel
 Requires(post): /sbin/install-info
@@ -30,6 +31,7 @@ specified in a script file or from the command line.
 %setup -q
 %patch0 -p1
 %patch1 -p1
+%patch2 -p1
 
 %build
 %configure --without-included-regex
@@ -70,6 +72,9 @@ rm -rf ${RPM_BUILD_ROOT}
 %{_mandir}/man*/*
 
 %changelog
+- avoid silent data loss when an input line is 2^31 bytes or longer
+  Resolves: #720438
+
 * Wed Feb 09 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.2.1-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild