diff --git a/Config.mk b/Config.mk
index d5d293dc07..7c1670faab 100644
--- a/Config.mk
+++ b/Config.mk
@@ -252,7 +252,7 @@ QEMU_TRADITIONAL_URL ?= git://xenbits.xen.org/qemu-xen-4.5-testing.git
 SEABIOS_UPSTREAM_URL ?= git://xenbits.xen.org/seabios.git
 endif
 OVMF_UPSTREAM_REVISION ?= 447d264115c476142f884af0be287622cd244423
-QEMU_UPSTREAM_REVISION ?= qemu-xen-4.5.1-rc1
+QEMU_UPSTREAM_REVISION ?= qemu-xen-4.5.1-rc2
 SEABIOS_UPSTREAM_REVISION ?= rel-1.7.5
 # Thu May 22 16:59:16 2014 -0400
 # python3 fixes for vgabios and csm builds.
@@ -260,7 +260,7 @@ SEABIOS_UPSTREAM_REVISION ?= rel-1.7.5
 ETHERBOOT_NICS ?= rtl8139 8086100e
 
 
-QEMU_TRADITIONAL_REVISION ?= e42b84cf1c524d017208b981c7749dc5945dda72
+QEMU_TRADITIONAL_REVISION ?= xen-4.5.1-rc2
 # Wed May 6 09:48:59 2015 +0200
 # fdc: force the fifo access to be in bounds of the allocated buffer
 
diff --git a/xen/Makefile b/xen/Makefile
index 57203934c8..a5b47f7d2f 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -2,7 +2,7 @@
 # All other places this is stored (eg. compile.h) should be autogenerated.
 export XEN_VERSION       = 4
 export XEN_SUBVERSION    = 5
-export XEN_EXTRAVERSION ?= .1-rc1$(XEN_VENDORVERSION)
+export XEN_EXTRAVERSION ?= .1-rc2$(XEN_VENDORVERSION)
 export XEN_FULLVERSION   = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
 -include xen-version