diff --git a/qemu-disable-preadv-support.patch b/qemu-disable-preadv-support.patch
new file mode 100644
index 0000000..2c255de
--- /dev/null
+++ b/qemu-disable-preadv-support.patch
@@ -0,0 +1,31 @@
+From ef41d27fae62bbb71f3af60488b455582ee92625 Mon Sep 17 00:00:00 2001
+From: Mark McLoughlin <markmc@redhat.com>
+Date: Wed, 4 Nov 2009 12:29:35 -0500
+Subject: [PATCH] Disable preadv/pwritev support
+
+Workaround for a data corruptor issue on 32 bit hosts:
+
+  https://bugzilla.redhat.com/526549
+
+Signed-off-by: Mark McLoughlin <markmc@redhat.com>
+Fedora-patch: qemu-disable-preadv-support.patch
+---
+ posix-aio-compat.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/posix-aio-compat.c b/posix-aio-compat.c
+index e9fc9fa..b116933 100644
+--- a/posix-aio-compat.c
++++ b/posix-aio-compat.c
+@@ -34,7 +34,7 @@ static int idle_threads = 0;
+ static TAILQ_HEAD(, qemu_paiocb) request_list;
+ 
+ #ifdef HAVE_PREADV
+-static int preadv_present = 1;
++static int preadv_present = 0;
+ #else
+ static int preadv_present = 0;
+ #endif
+-- 
+1.6.2.5
+
diff --git a/qemu.spec b/qemu.spec
index de3b84a..6878fc5 100644
--- a/qemu.spec
+++ b/qemu.spec
@@ -1,7 +1,7 @@
 Summary: QEMU is a FAST! processor emulator
 Name: qemu
 Version: 0.11.0
-Release: 10%{?dist}
+Release: 11%{?dist}
 # Epoch because we pushed a qemu-1.0 package
 Epoch: 2
 License: GPLv2+ and LGPLv2+ and BSD
@@ -58,6 +58,9 @@ Patch11: qemu-properly-save-kvm-system-time-registers.patch
 # Fix dropped packets with non-virtio NICs (#531419)
 Patch12: qemu-fix-dropped-packets-with-non-virtio-nics.patch
 
+# Temporarily disable preadv/pwritev support (#526549)
+Patch13: qemu-disable-preadv-support.patch
+
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: SDL-devel zlib-devel which texi2html gnutls-devel cyrus-sasl-devel
 BuildRequires: rsync dev86 iasl
@@ -257,6 +260,7 @@ such as kvmtrace and kvm_stat.
 %patch10 -p1
 %patch11 -p1
 %patch12 -p1
+%patch13 -p1
 
 %build
 # --build-id option is used fedora 8 onwards for giving info to the debug packages.
@@ -538,6 +542,9 @@ fi
 %{_mandir}/man1/qemu-img.1*
 
 %changelog
+* Wed Nov  4 2009 Mark McLoughlin <markmc@redhat.com> - 2:0.11.0-11
+- Temporarily disable preadv/pwritev support to fix data corruption (#526549)
+
 * Tue Nov  3 2009 Justin M. Forbes <jforbes@redhat.com> - 2:0.11.0-10
 - Default ksm and ksmtuned services on.