diff --git a/srcpkgs/xen/patches/ocaml-4.12.patch b/srcpkgs/xen/patches/ocaml-4.12.patch
new file mode 100644
index 00000000000..32ec8657e3b
--- /dev/null
+++ b/srcpkgs/xen/patches/ocaml-4.12.patch
@@ -0,0 +1,36 @@
+2021-04-06 - Anton Farygin <rider@altlinux.org> 4.14.1-alt2
+- fixed build with ocaml-4.12.0
+
+--- xen-4.14.1/tools/ocaml/libs/xentoollog/xentoollog_stubs.c.orig	2020-12-17 16:47:25.000000000 +0000
++++ xen-4.14.1/tools/ocaml/libs/xentoollog/xentoollog_stubs.c	2021-03-01 22:53:23.106205483 +0000
+@@ -53,8 +53,6 @@
+ #include "_xtl_levels.inc"
+ 
+ /* Option type support as per http://www.linux-nantes.org/~fmonnier/ocaml/ocaml-wrapping-c.php */
+-#define Val_none Val_int(0)
+-#define Some_val(v) Field(v,0)
+ 
+ static value Val_some(value v)
+ {
+--- xen-4.14.1/tools/ocaml/libs/xl/xenlight_stubs.c.orig	2020-12-17 16:47:25.000000000 +0000
++++ xen-4.14.1/tools/ocaml/libs/xl/xenlight_stubs.c	2021-03-01 23:01:24.229859714 +0000
+@@ -227,8 +227,6 @@
+ }
+ 
+ /* Option type support as per http://www.linux-nantes.org/~fmonnier/ocaml/ocaml-wrapping-c.php */
+-#define Val_none Val_int(0)
+-#define Some_val(v) Field(v,0)
+ 
+ static value Val_some(value v)
+ {
+--- xen-4.14.1/tools/ocaml/libs/xc/xenctrl_stubs.c.orig	2020-12-17 16:47:25.000000000 +0000
++++ xen-4.14.1/tools/ocaml/libs/xc/xenctrl_stubs.c	2021-03-01 23:24:45.477290290 +0000
+@@ -43,8 +43,6 @@
+ #define _H(__h) ((xc_interface *)(__h))
+ #define _D(__d) ((uint32_t)Int_val(__d))
+ 
+-#define Val_none (Val_int(0))
+-
+ #define string_of_option_array(array, index) \
+ 	((Field(array, index) == Val_none) ? NULL : String_val(Field(Field(array, index), 0)))
+ 
diff --git a/srcpkgs/xen/template b/srcpkgs/xen/template
index d916f29ac38..930296532e9 100644
--- a/srcpkgs/xen/template
+++ b/srcpkgs/xen/template
@@ -1,7 +1,7 @@
 # Template file for 'xen'
 pkgname=xen
 version=4.14.1
-revision=2
+revision=3
 # grep -R IPXE_GIT_TAG src/xen-*/tools/firmware/etherboot
 _git_tag_ipxe=4bd064de239dab2426b31c9789a1f4d78087dc63
 # TODO: arm / aarch64
@@ -14,7 +14,8 @@ hostmakedepends="acpica-utils automake bison flex fig2dev gettext ghostscript gi
  ocaml ocaml-findlib pandoc pkg-config python3-Markdown tar texinfo wget"
 makedepends="SDL-devel dev86 dtc-devel e2fsprogs-devel gnutls-devel libaio-devel
  libbluetooth-devel libglib-devel liblzma-devel libnl3-devel openssl-devel
- netpbm pciutils-devel pixman-devel python3-devel seabios yajl-devel"
+ netpbm pciutils-devel pixman-devel python3-devel seabios yajl-devel
+ ncurses-devel"
 depends="bridge-utils perl xen-hypervisor"
 short_desc="Xen hypervisor utilities"
 maintainer="Chris Brannon <chris@the-brannons.com>"