diff --git a/libguestfs-1.12.0-configure-force-machine-accel-tcg.patch b/libguestfs-1.12.0-configure-force-machine-accel-tcg.patch
new file mode 100644
index 0000000..a63ec6d
--- /dev/null
+++ b/libguestfs-1.12.0-configure-force-machine-accel-tcg.patch
@@ -0,0 +1,25 @@
+Only in libguestfs-1.12.0: autom4te.cache
+diff -ur libguestfs-1.12.0.old/configure libguestfs-1.12.0/configure
+--- libguestfs-1.12.0.old/configure	2011-07-20 16:40:27.000000000 +0100
++++ libguestfs-1.12.0/configure	2011-07-20 18:48:50.261315374 +0100
+@@ -36849,7 +36849,7 @@
+ 
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for virtio-serial support in $QEMU" >&5
+ $as_echo_n "checking for virtio-serial support in $QEMU... " >&6; }
+-    if $QEMU -nographic -device \? 2>&1 | grep -sq virtio-serial; then
++    if $QEMU -machine accel=tcg -nographic -device \? 2>&1 | grep -sq virtio-serial; then
+         { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+ $as_echo "yes" >&6; }
+     else
+diff -ur libguestfs-1.12.0.old/configure.ac libguestfs-1.12.0/configure.ac
+--- libguestfs-1.12.0.old/configure.ac	2011-07-20 16:35:50.000000000 +0100
++++ libguestfs-1.12.0/configure.ac	2011-07-20 18:48:41.251139811 +0100
+@@ -326,7 +326,7 @@
+     fi
+ 
+     AC_MSG_CHECKING([for virtio-serial support in $QEMU])
+-    if $QEMU -nographic -device \? 2>&1 | grep -sq virtio-serial; then
++    if $QEMU -machine accel=tcg -nographic -device \? 2>&1 | grep -sq virtio-serial; then
+         AC_MSG_RESULT([yes])
+     else
+         AC_MSG_RESULT([no])
diff --git a/libguestfs.spec b/libguestfs.spec
index b319628..4fe3f41 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -30,7 +30,7 @@ Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
 Version:       1.12.0
-Release:       1%{?dist}
+Release:       2%{?dist}
 License:       LGPLv2+
 Group:         Development/Libraries
 URL:           http://libguestfs.org/
@@ -44,6 +44,9 @@ Patch0:        libguestfs-1.7.13-no-fuse-test.patch
 # See: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628522
 Patch1:        0001-perl-Don-t-set-CCFLAGS.patch
 
+# Force qemu-kvm test to run with -machine accel=tcg flag.
+Patch2:        libguestfs-1.12.0-configure-force-machine-accel-tcg.patch
+
 # Basic build requirements:
 BuildRequires: /usr/bin/pod2man
 BuildRequires: /usr/bin/pod2text
@@ -496,6 +499,7 @@ for %{name}.
 
 %patch0 -p1
 %patch1 -p1
+%patch2 -p1
 
 mkdir -p daemon/m4
 
@@ -860,6 +864,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Wed Jul 20 2011 Richard W.M. Jones <rjones@redhat.com> - 1:1.12.0-2
+- Readd patch to fix virtio-serial test for qemu 0.15.
+
 * Wed Jul 20 2011 Richard W.M. Jones <rjones@redhat.com> - 1:1.12.0-1
 - New stable version 1.12.0 for Fedora 16.
 - Remove upstream patch.