diff --git a/408.patch b/408.patch
new file mode 100644
index 0000000..1ff0d8f
--- /dev/null
+++ b/408.patch
@@ -0,0 +1,56 @@
+From c0d62d041371970297c31ac86465cf8983386191 Mon Sep 17 00:00:00 2001
+From: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
+Date: Sun, 23 Jul 2023 17:15:18 +0200
+Subject: [PATCH] Use PyType_GetDict to safely access tp_dict [3.12]
+
+---
+ src/util.rs          | 15 ++++++++++++++-
+ test/test_default.py | 12 ++++++++++++
+ 2 files changed, 26 insertions(+), 1 deletion(-)
+
+diff --git a/src/util.rs b/src/util.rs
+index 3b451bd5..ba011c1a 100644
+--- a/src/util.rs
++++ b/src/util.rs
+@@ -125,7 +125,20 @@ macro_rules! str_hash {
+     };
+ }
+ 
+-#[cfg(Py_3_10)]
++#[cfg(Py_3_12)]
++macro_rules! pydict_contains {
++    ($obj1:expr, $obj2:expr) => {
++        unsafe {
++            pyo3_ffi::_PyDict_Contains_KnownHash(
++                pyo3_ffi::PyType_GetDict($obj1),
++                $obj2,
++                (*$obj2.cast::<pyo3_ffi::PyASCIIObject>()).hash,
++            ) == 1
++        }
++    };
++}
++
++#[cfg(all(Py_3_10, not(Py_3_12)))]
+ macro_rules! pydict_contains {
+     ($obj1:expr, $obj2:expr) => {
+         unsafe {
+diff --git a/test/test_default.py b/test/test_default.py
+index d1e95587..547fce8c 100644
+--- a/test/test_default.py
++++ b/test/test_default.py
+@@ -275,3 +275,15 @@ def default(obj):
+             orjson.dumps(ref, default=default)
+ 
+         assert sys.getrefcount(ref) == 2  # one for ref, one for default
++
++    def test_default_set(self):
++        """
++        dumps() default function with set
++        """
++
++        def default(obj):
++            if isinstance(obj, set):
++                return list(obj)
++            raise TypeError
++
++        assert orjson.dumps({1, 2}, default=default) == b"[1,2]"
diff --git a/python-orjson.spec b/python-orjson.spec
index a9b899b..39a7965 100644
--- a/python-orjson.spec
+++ b/python-orjson.spec
@@ -9,12 +9,16 @@
 
 Name:           python-orjson
 Version:        3.9.2
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Fast, correct Python JSON library
 
 License:        Apache-2.0 OR MIT
 URL:            https://github.com/ijl/orjson
 Source:         %{pypi_source orjson}
+
+# Compatibility with Python 3.12
+Patch:          https://github.com/ijl/orjson/pull/408.patch
+
 # Ineligble for upstreaming
 Patch:          Remove-unstable-simd-feature.patch
 
@@ -91,6 +95,10 @@ export RUSTFLAGS='%{build_rustflags}'
 
 
 %changelog
+* Tue Jul 25 2023 Tomáš Hrnčiar <thrnciar@redhat.com> - 3.9.2-2
+- Backport patch to add PyType_GetDict for Python 3.12
+- Fixes: rhbz#2220383
+
 * Fri Jul 21 2023 Maxwell G <maxwell@gtmx.me> - 3.9.2-1
 - Update to 3.9.2. Fixes rhbz#2211703.