diff --git a/0001-ocaml-Use-Gc.finalise-instead-of-a-C-finalizer.patch b/0001-ocaml-Use-Gc.finalise-instead-of-a-C-finalizer.patch
deleted file mode 100644
index 5e3296e..0000000
--- a/0001-ocaml-Use-Gc.finalise-instead-of-a-C-finalizer.patch
+++ /dev/null
@@ -1,134 +0,0 @@
-From 61418535ad63b5a2a91f1caf4703d7134834e4dd Mon Sep 17 00:00:00 2001
-From: "Richard W.M. Jones" <rjones@redhat.com>
-Date: Wed, 13 Dec 2023 22:50:56 +0000
-Subject: [PATCH 1/2] ocaml: Use Gc.finalise instead of a C finalizer
-
-Since OCaml 5.1.1, changes to custom blocks caused C finalizers that
-call caml_enter_blocking_section to stop working (if they ever did
-before).  They are relatively inflexible compared to registering an
-OCaml finalizer (Gc.finalise) to call Guestfs.close, so use that
-instead.
-
-Suggested-by: Guillaume Munch-Maccagnoni
-See: https://github.com/ocaml/ocaml/issues/12820
-See: https://gitlab.com/nbdkit/libnbd/-/commit/db48794fa89547a4799b832331e82b4b8b98f03d
----
- generator/OCaml.ml |  7 ++++-
- ocaml/guestfs-c.c  | 69 +++++++++++++++++++++-------------------------
- 2 files changed, 37 insertions(+), 39 deletions(-)
-
-diff --git a/generator/OCaml.ml b/generator/OCaml.ml
-index 07ccd26924..1e6f603ab2 100644
---- a/generator/OCaml.ml
-+++ b/generator/OCaml.ml
-@@ -312,10 +312,15 @@ type t
- exception Error of string
- exception Handle_closed of string
- 
--external create : ?environment:bool -> ?close_on_exit:bool -> unit -> t =
-+external _create : ?environment:bool -> ?close_on_exit:bool -> unit -> t =
-   \"guestfs_int_ocaml_create\"
- external close : t -> unit = \"guestfs_int_ocaml_close\"
- 
-+let create ?environment ?close_on_exit () =
-+  let g = _create ?environment ?close_on_exit () in
-+  Gc.finalise close g;
-+  g
-+
- type event =
- ";
-   List.iter (
-diff --git a/ocaml/guestfs-c.c b/ocaml/guestfs-c.c
-index 8a8761e883..700c33abf4 100644
---- a/ocaml/guestfs-c.c
-+++ b/ocaml/guestfs-c.c
-@@ -61,43 +61,10 @@ value guestfs_int_ocaml_delete_event_callback (value gv, value eh);
- value guestfs_int_ocaml_event_to_string (value events);
- value guestfs_int_ocaml_last_errno (value gv);
- 
--/* Allocate handles and deal with finalization. */
--static void
--guestfs_finalize (value gv)
--{
--  guestfs_h *g = Guestfs_val (gv);
--
--  if (g) {
--    /* There is a nasty, difficult to solve case here where the
--     * user deletes events in one of the callbacks that we are
--     * about to invoke, resulting in a double-free.  XXX
--     */
--    size_t len;
--    value **roots = get_all_event_callbacks (g, &len);
--
--    /* Close the handle: this could invoke callbacks from the list
--     * above, which is why we don't want to delete them before
--     * closing the handle.
--     */
--    caml_release_runtime_system ();
--    guestfs_close (g);
--    caml_acquire_runtime_system ();
--
--    /* Now unregister the global roots. */
--    if (roots && len > 0) {
--      size_t i;
--      for (i = 0; i < len; ++i) {
--        caml_remove_generational_global_root (roots[i]);
--        free (roots[i]);
--      }
--      free (roots);
--    }
--  }
--}
--
-+/* Allocate handles. */
- static struct custom_operations guestfs_custom_operations = {
-   (char *) "guestfs_custom_operations",
--  guestfs_finalize,
-+  custom_finalize_default,
-   custom_compare_default,
-   custom_hash_default,
-   custom_serialize_default,
-@@ -179,11 +146,37 @@ value
- guestfs_int_ocaml_close (value gv)
- {
-   CAMLparam1 (gv);
-+  guestfs_h *g = Guestfs_val (gv);
- 
--  guestfs_finalize (gv);
-+  if (g) {
-+    /* There is a nasty, difficult to solve case here where the
-+     * user deletes events in one of the callbacks that we are
-+     * about to invoke, resulting in a double-free.  XXX
-+     */
-+    size_t len;
-+    value **roots = get_all_event_callbacks (g, &len);
- 
--  /* So we don't double-free in the finalizer. */
--  Guestfs_val (gv) = NULL;
-+    /* Close the handle: this could invoke callbacks from the list
-+     * above, which is why we don't want to delete them before
-+     * closing the handle.
-+     */
-+    caml_release_runtime_system ();
-+    guestfs_close (g);
-+    caml_acquire_runtime_system ();
-+
-+    /* Now unregister the global roots. */
-+    if (roots && len > 0) {
-+      size_t i;
-+      for (i = 0; i < len; ++i) {
-+        caml_remove_generational_global_root (roots[i]);
-+        free (roots[i]);
-+      }
-+      free (roots);
-+    }
-+
-+    /* So we don't double-free. */
-+    Guestfs_val (gv) = NULL;
-+  }
- 
-   CAMLreturn (Val_unit);
- }
--- 
-2.43.0
-
diff --git a/0002-ocaml-Nullify-custom-block-before-releasing-runtime-.patch b/0002-ocaml-Nullify-custom-block-before-releasing-runtime-.patch
deleted file mode 100644
index 80b67ab..0000000
--- a/0002-ocaml-Nullify-custom-block-before-releasing-runtime-.patch
+++ /dev/null
@@ -1,41 +0,0 @@
-From e93fd7e8acf34192c0d1b70611e3474dde346941 Mon Sep 17 00:00:00 2001
-From: "Richard W.M. Jones" <rjones@redhat.com>
-Date: Thu, 14 Dec 2023 08:33:10 +0000
-Subject: [PATCH 2/2] ocaml: Nullify custom block before releasing runtime lock
-
-Avoids a potential, though if possible then very rare, double free
-path.
-
-Suggested-by: Guillaume Munch-Maccagnoni
-See: https://github.com/ocaml/ocaml/issues/12820
----
- ocaml/guestfs-c.c | 6 +++---
- 1 file changed, 3 insertions(+), 3 deletions(-)
-
-diff --git a/ocaml/guestfs-c.c b/ocaml/guestfs-c.c
-index 700c33abf4..ea9a0598a6 100644
---- a/ocaml/guestfs-c.c
-+++ b/ocaml/guestfs-c.c
-@@ -156,6 +156,9 @@ guestfs_int_ocaml_close (value gv)
-     size_t len;
-     value **roots = get_all_event_callbacks (g, &len);
- 
-+    /* So we don't double-free. */
-+    Guestfs_val (gv) = NULL;
-+
-     /* Close the handle: this could invoke callbacks from the list
-      * above, which is why we don't want to delete them before
-      * closing the handle.
-@@ -173,9 +176,6 @@ guestfs_int_ocaml_close (value gv)
-       }
-       free (roots);
-     }
--
--    /* So we don't double-free. */
--    Guestfs_val (gv) = NULL;
-   }
- 
-   CAMLreturn (Val_unit);
--- 
-2.43.0
-
diff --git a/libguestfs.spec b/libguestfs.spec
index 3e44075..4753cf8 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -49,8 +49,8 @@ ExcludeArch: %{ix86}
 Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
-Version:       1.51.9
-Release:       4%{?dist}
+Version:       1.51.10
+Release:       1%{?dist}
 License:       LGPL-2.1-or-later
 
 # Build only for architectures that have a kernel
@@ -84,10 +84,6 @@ Source7:       libguestfs.keyring
 # Maintainer script which helps with handling patches.
 Source8:       copy-patches.sh
 
-# Fixes for https://github.com/ocaml/ocaml/issues/12820
-Patch: 0001-ocaml-Use-Gc.finalise-instead-of-a-C-finalizer.patch
-Patch: 0002-ocaml-Nullify-custom-block-before-releasing-runtime-.patch
-
 %if 0%{patches_touch_autotools}
 BuildRequires: autoconf, automake, libtool, gettext-devel
 %endif
@@ -1098,6 +1094,9 @@ rm ocaml/html/.gitignore
 
 
 %changelog
+* Tue Dec 19 2023 Richard W.M. Jones <rjones@redhat.com> - 1:1.51.10-1
+- New upstream development version 1.51.10
+
 * Mon Dec 18 2023 Richard W.M. Jones <rjones@redhat.com> - 1:1.51.9-4
 - OCaml 5.1.1 + s390x code gen fix for Fedora 40
 
diff --git a/sources b/sources
index ba9c6a2..fd66f1a 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (libguestfs-1.51.9.tar.gz) = 496f9e5a4fb9b7eef56c7dd35720a2ef1f56f286d14e6d3425c317638c7a7ab05563e628f9e5bc9d715ecfbb8f739abd4e8f415d9b352580070216e6b7659ee0
-SHA512 (libguestfs-1.51.9.tar.gz.sig) = 1e2155d7939a2cbd227a4c01f6fdd8e8d4846345abc8cf5e580a5692f36cba0167b92453a552132899689b591ade82b57f4952cf00b058bf53e57eefb1914c72
+SHA512 (libguestfs-1.51.10.tar.gz) = 3c86a9db596433e54dc1cb7d24ce62f2d283208bcc34bd4c47a22f363655b855bc0d9dfcbdd0b803f086fba3e9f97fd98c02d6b4e50f768f4ddedfd4a6c6beff
+SHA512 (libguestfs-1.51.10.tar.gz.sig) = 50819a2cd5de70f9875101517469c137bd14aa8728229abebdd7018bfeda7918148bb951342288d4d89fcbdfc72d8d5e69c8abb60cec0c8cf041c76543e20cb3