diff --git a/qemu-Allow-to-leave-type-on-default-in-machine.patch b/qemu-Allow-to-leave-type-on-default-in-machine.patch
new file mode 100644
index 0000000..e4a8e6d
--- /dev/null
+++ b/qemu-Allow-to-leave-type-on-default-in-machine.patch
@@ -0,0 +1,14 @@
+--- qemu-kvm-0.15.0.old/vl.c	2011-08-09 13:40:29.000000000 +0100
++++ qemu-kvm-0.15.0/vl.c	2011-08-18 16:38:51.487515037 +0100
+@@ -2718,7 +2718,10 @@
+                     fprintf(stderr, "parse error: %s\n", optarg);
+                     exit(1);
+                 }
+-                machine = machine_parse(qemu_opt_get(opts, "type"));
++                optarg = qemu_opt_get(opts, "type");
++                if (optarg) {
++                    machine = machine_parse(optarg);
++                }
+                 break;
+ 	    case QEMU_OPTION_no_kvm:
+                 olist = qemu_find_opts("machine");
diff --git a/qemu.spec b/qemu.spec
index ec75e78..4f6661c 100644
--- a/qemu.spec
+++ b/qemu.spec
@@ -1,7 +1,7 @@
 Summary: QEMU is a FAST! processor emulator
 Name: qemu
 Version: 0.15.0
-Release: 1%{?dist}
+Release: 2%{?dist}
 # Epoch because we pushed a qemu-1.0 package
 Epoch: 2
 License: GPLv2+ and LGPLv2+ and BSD
@@ -64,6 +64,11 @@ Patch26: 0026-usb-redir-Call-qemu_chr_guest_open-close.patch
 Patch27: 0027-usb-redir-Device-disconnect-re-connect-robustness-fi.patch
 Patch28: 0028-usb-redir-Don-t-try-to-write-to-the-chardev-after-a-.patch
 
+# Allow -machine parameter to be used without specifying a machine type.
+# Upstream in qemu but apparently not in qemu-kvm yet.
+# qemu commit 2645c6dcaf6ea2a51a3b6dfa407dd203004e4d11
+Patch100: qemu-Allow-to-leave-type-on-default-in-machine.patch
+
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: SDL-devel zlib-devel which texi2html gnutls-devel cyrus-sasl-devel
 BuildRequires: libaio-devel
@@ -265,6 +270,8 @@ such as kvm_stat.
 %patch27 -p1
 %patch28 -p1
 
+%patch100 -p1
+
 %build
 # By default we build everything, but allow x86 to build a minimal version
 # with only similar arch target support
@@ -574,6 +581,10 @@ fi
 %{_mandir}/man1/qemu-img.1*
 
 %changelog
+* Thu Aug 18 2011 Richard W.M. Jones <rjones@redhat.com> - 2:0.15.0-2
+- Add upstream qemu patch 'Allow to leave type on default in -machine'
+  (2645c6dcaf6ea2a51a3b6dfa407dd203004e4d11).
+
 * Sun Aug 14 2011 Justin M. Forbes <jforbes@redhat.com> - 2:0.15.0-1
 - Update to 0.15.0 stable release.