diff --git a/Config.mk b/Config.mk
index 1e034f7963..a6cd2e3f2d 100644
--- a/Config.mk
+++ b/Config.mk
@@ -234,7 +234,7 @@ QEMU_UPSTREAM_URL ?= git://xenbits.xen.org/qemu-upstream-unstable.git
 SEABIOS_UPSTREAM_URL ?= git://xenbits.xen.org/seabios.git
 endif
 OVMF_UPSTREAM_REVISION ?= 447d264115c476142f884af0be287622cd244423
-QEMU_UPSTREAM_REVISION ?= master
+QEMU_UPSTREAM_REVISION ?= qemu-xen-4.4.0-rc4
 SEABIOS_UPSTREAM_TAG ?= rel-1.7.3.1
 # Fri Aug 2 14:12:09 2013 -0400
 # Fix bug in CBFS file walking with compressed files.