diff --git a/SOURCES/xapi-23.31.0-fix-ipv6-import.XCP-ng.patch b/SOURCES/xapi-23.31.0-fix-ipv6-import.XCP-ng.patch
new file mode 100644
index 0000000..e76f0fa
--- /dev/null
+++ b/SOURCES/xapi-23.31.0-fix-ipv6-import.XCP-ng.patch
@@ -0,0 +1,26 @@
+Add brackets in `Host` header of http request when relevant.
+See: https://github.com/mirage/ocaml-cohttp/issues/997
+
+diff --git i/ocaml/xapi/xapi_vm.ml w/ocaml/xapi/xapi_vm.ml
+index 4db86acbd..e310f5549 100644
+--- i/ocaml/xapi/xapi_vm.ml
++++ w/ocaml/xapi/xapi_vm.ml
+@@ -1518,7 +1518,17 @@ let rec import_inner n ~__context ~url ~sr ~full_restore ~force =
+             Cohttp.Request.Make (Cohttp_posix_io.Unbuffered_IO) in
+           let module Response =
+             Cohttp.Response.Make (Cohttp_posix_io.Unbuffered_IO) in
+-          let request = Cohttp.Request.make ~meth:`GET uri in
++          let headers = Cohttp.Header.init () in
++          let headers =
++            Cohttp.Header.add_unless_exists headers "host"
++              (match Uri.scheme uri with
++              | Some "httpunix" -> ""
++              | _ -> (
++                (Http.Url.maybe_wrap_IPv6_literal (Uri.host_with_default ~default:"localhost" uri))
++                  ^
++                  match Uri.port uri with Some p -> ":" ^ string_of_int p | None -> ""))
++          in
++          let request = Cohttp.Request.make ~meth:`GET ?headers:(Some headers) uri in
+           let ic =
+             {
+               Cohttp_posix_io.Unbuffered_IO.header_buffer= None
diff --git a/SPECS/xapi.spec b/SPECS/xapi.spec
index a35e132..7fc12de 100644
--- a/SPECS/xapi.spec
+++ b/SPECS/xapi.spec
@@ -18,7 +18,7 @@
 Summary: xapi - xen toolstack for XCP
 Name:    xapi
 Version: 23.31.0
-Release: 1.1%{?xsrel}%{?dist}
+Release: 1.3%{?xsrel}%{?dist}
 Group:   System/Hypervisor
 License: LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception
 URL:  http://www.xen.org
@@ -61,6 +61,7 @@ Patch1003: xapi-23.24.0-update-db-tunnel-protocol-from-other_config.XCP-ng.patch
 # Needed for IPv6 support. Upstream wants a better fix. Drop when upstream fixed it.
 Patch1004: xapi-23.3.0-filter-link-local-address-ipv6.XCP-ng.patch
 Patch1005: xapi-23.31.0-extend-uefi-cert-api.patch
+Patch1006: xapi-23.31.0-fix-ipv6-import.XCP-ng.patch
 
 %{?_cov_buildrequires}
 BuildRequires: ocaml-ocamldoc
@@ -1340,6 +1341,9 @@ Coverage files from unit tests
 %{?_cov_results_package}
 
 %changelog
+* Thu Feb 08 2024 Benjamin Reis <benjamin.reis@vates.tech> - 23.31.0-1.3
+- Add xapi-23.31.0-fix-ipv6-import.XCP-ng.patch
+
 * Mon Jan 22 2024 Samuel Verschelde <stormi-xcp@ylix.fr> - 23.31.0-1.1
 - Rebase on 23.31.0-1
 - Rediff patches (Benjamin Reis)