diff --git a/0001-Related-rhbz-711087-band-aid.patch b/0001-Related-rhbz-711087-band-aid.patch
new file mode 100644
index 0000000..384115e
--- /dev/null
+++ b/0001-Related-rhbz-711087-band-aid.patch
@@ -0,0 +1,26 @@
+From fe44d66adbab17b804a27d91148490b23fce75da Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
+Date: Fri, 17 Jun 2011 16:14:12 +0100
+Subject: [PATCH] Related: rhbz#711087 band-aid
+
+---
+ sc/source/ui/undo/undoblk.cxx |    3 +++
+ 1 files changed, 3 insertions(+), 0 deletions(-)
+
+diff --git a/sc/source/ui/undo/undoblk.cxx b/sc/source/ui/undo/undoblk.cxx
+index 8439801..d535c9c 100644
+--- a/sc/source/ui/undo/undoblk.cxx
++++ b/sc/source/ui/undo/undoblk.cxx
+@@ -2084,6 +2084,9 @@ void ScUndoRemoveMerge::Undo()
+     for (set<SCTAB>::const_iterator itr = maOption.maTabs.begin(), itrEnd = maOption.maTabs.end();
+           itr != itrEnd; ++itr)
+     {
++        OSL_ENSURE(pUndoDoc, "NULL pUndoDoc!");
++        if (!pUndoDoc)
++            continue;
+         // There is no need to extend merge area because it's already been extended.
+         ScRange aRange = maOption.getSingleRange(*itr);
+         pDoc->DeleteAreaTab(aRange, IDF_ATTRIB);
+-- 
+1.7.5.4
+
diff --git a/libreoffice.spec b/libreoffice.spec
index a05d3b8..c6b58bf 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -19,7 +19,7 @@ Summary:        Free Software Productivity Suite
 Name:           libreoffice
 Epoch:          1
 Version:        3.4.1.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 License:        LGPLv3 and LGPLv2+ and BSD and (MPLv1.1 or GPLv2 or LGPLv2 or Netscape) and (CDDL or GPLv2) and Public Domain
 Group:          Applications/Productivity
 URL:            http://www.documentfoundation.org/develop
@@ -95,6 +95,7 @@ Patch16: 0001-handle-NULL-display-gracefully.patch
 Patch17: 0001-Related-rhbz-652604-better-survive-exceptions-thrown.patch
 Patch18: 0001-Resolves-rhbz-713154-pdf-export-dialog-too-tall-to-f.patch
 Patch19: 0001-Related-rhbz-702833-addEventListener-without-removeE.patch
+Patch20: 0001-Related-rhbz-711087-band-aid.patch
 
 %{!?python_sitearch: %global python_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1))")}
 %define instdir %{_libdir}
@@ -715,6 +716,7 @@ mv -f redhat.soc extras/source/palettes/standard.soc
 %patch17 -p1 -b .rhbz652604-better-survive-exceptions-thrown.patch
 %patch18 -p1 -b .rhbz713154-pdf-export-dialog-too-tall-to-f.patch
 %patch19 -p1 -b .rhbz702833-addEventListener-without-removeE.patch
+%patch20 -p1 -b .rhbz711087-band-aid.patch
 
 # these are horribly incomplete--empty translations and copied english
 # strings with spattering of translated strings
@@ -1995,6 +1997,9 @@ update-desktop-database %{_datadir}/applications &> /dev/null || :
 %{basisinstdir}/program/kde-open-url
 
 %changelog
+* Fri Jun 17 2011 Caolán McNamara <caolanm@redhat.com> - 3.4.1.1-4-UNBUILT
+- Related: rhbz#711087 band aid for crash in sc undo
+
 * Fri Jun 17 2011 Caolán McNamara <caolanm@redhat.com> - 3.4.1.1-3
 - Related: rhbz#702833 addEventListener without removeEventListener