diff --git a/debian/changelog b/debian/changelog
index 6b4293c98..f2f63f975 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -16,6 +16,9 @@ linux (3.7.2-1~experimental.1) UNRELEASED; urgency=low
   * udeb: Remove ipv6-modules on all architectures/flavours except for
     armel/iop32x (fixes FTBFS)
 
+  [ Ian Campbell ]
+  * [x86/xen] Update microcode driver to use new API.
+
  -- Ben Hutchings <ben@decadent.org.uk>  Sun, 06 Jan 2013 04:39:12 +0000
 
 linux (3.7.1-1~experimental.2) experimental; urgency=low
diff --git a/debian/patches/features/all/xen/microcode-api-update.patch b/debian/patches/features/all/xen/microcode-api-update.patch
new file mode 100644
index 000000000..2e34a3526
--- /dev/null
+++ b/debian/patches/features/all/xen/microcode-api-update.patch
@@ -0,0 +1,27 @@
+From 7a02502f75547538eb4e99273f1fe2b8d797fbb3 Mon Sep 17 00:00:00 2001
+From: Ian Campbell <ijc@hellion.org.uk>
+Date: Wed, 16 Jan 2013 13:38:20 +0000
+Subject: [PATCH] microcode_xen: update for changed core API
+
+Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
+---
+ arch/x86/kernel/microcode_xen.c |    3 ++-
+ 1 files changed, 2 insertions(+), 1 deletions(-)
+
+diff --git a/arch/x86/kernel/microcode_xen.c b/arch/x86/kernel/microcode_xen.c
+index 9e50566..6b7aa48 100644
+--- a/arch/x86/kernel/microcode_xen.c
++++ b/arch/x86/kernel/microcode_xen.c
+@@ -56,7 +56,8 @@ static int xen_microcode_update(int cpu)
+ 	return err;
+ }
+ 
+-static enum ucode_state xen_request_microcode_fw(int cpu, struct device *device)
++static enum ucode_state xen_request_microcode_fw(int cpu, struct device *device,
++						 bool refresh_fw)
+ {
+ 	char name[36];
+ 	struct cpuinfo_x86 *c = &cpu_data(cpu);
+-- 
+1.7.2.5
+
diff --git a/debian/patches/series b/debian/patches/series
index 4c7ad0bcb..e9f2e4fab 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -68,3 +68,6 @@ debian/ast-disable-autoload.patch
 debian/mgag200-disable-autoload.patch
 clean-modules-without-link-vmlinux.sh.patch
 bugfix/all/ath6kl-do-not-use-virt_addr_valid.patch
+
+features/all/xen/microcode-api-update.patch
+