diff --git a/32bit_ASN1_Time.patch b/32bit_ASN1_Time.patch
new file mode 100644
index 0000000..8a84fe3
--- /dev/null
+++ b/32bit_ASN1_Time.patch
@@ -0,0 +1,115 @@
+---
+ src/M2Crypto/util.py |    4 ++++
+ tests/test_asn1.py   |   11 +++++------
+ tests/test_x509.py   |    9 ++++-----
+ 3 files changed, 13 insertions(+), 11 deletions(-)
+
+--- a/src/M2Crypto/util.py
++++ b/src/M2Crypto/util.py
+@@ -13,6 +13,7 @@ from __future__ import absolute_import
+ 
+ import binascii
+ import logging
++import struct
+ import sys
+ 
+ from M2Crypto import m2, six
+@@ -29,6 +30,9 @@ class UtilError(Exception):
+ 
+ m2.util_init(UtilError)
+ 
++def is_32bit():
++    # type: () -> bool
++    return (struct.calcsize("P") * 8) == 32
+ 
+ def pkcs5_pad(data, blklen=8):
+     # type: (str, int) -> str
+--- a/tests/test_asn1.py
++++ b/tests/test_asn1.py
+@@ -5,10 +5,9 @@
+ Copyright (c) 2005 Open Source Applications Foundation. All rights reserved."""
+ 
+ import datetime
+-import platform
+ import time
+ 
+-from M2Crypto import ASN1, m2
++from M2Crypto import ASN1, m2, util
+ from tests import unittest
+ 
+ 
+@@ -39,7 +38,7 @@ class ASN1TestCase(unittest.TestCase):
+     def test_Object(self):
+         pass  # XXX Dunno how to test
+ 
+-    @unittest.skipIf(platform.system() == 'Windows', 'Skip on Windows.')
++    @unittest.skipIf(util.is_32bit(), 'Skip on 32bit architectures.')
+     def test_TIME(self):
+         asn1 = ASN1.ASN1_TIME()
+         self.assertEqual(str(asn1), 'Bad time value')
+@@ -66,7 +65,7 @@ class ASN1TestCase(unittest.TestCase):
+         t2 = time.strftime(format, time.gmtime(t))
+         self.assertEqual(t1, t2)
+ 
+-    @unittest.skipIf(platform.system() == 'Windows', 'Skip on Windows.')
++    @unittest.skipIf(util.is_32bit(), 'Skip on 32bit architectures.')
+     def test_UTCTIME(self):
+         asn1 = ASN1.ASN1_UTCTIME()
+         self.assertEqual(str(asn1), 'Bad time value')
+@@ -93,7 +92,7 @@ class ASN1TestCase(unittest.TestCase):
+         t2 = time.strftime(format, time.gmtime(t))
+         self.assertEqual(t1, t2)
+ 
+-    @unittest.skipIf(platform.system() == 'Windows', 'Skip on Windows.')
++    @unittest.skipIf(util.is_32bit(), 'Skip on 32bit architectures.')
+     def test_TIME_datetime(self):
+         asn1 = ASN1.ASN1_TIME()
+         # Test get_datetime and set_datetime
+@@ -119,7 +118,7 @@ class ASN1TestCase(unittest.TestCase):
+         self.assertEqual(t1, t2)
+         self.assertEqual(str(udt), str(asn1.get_datetime()))
+ 
+-    @unittest.skipIf(platform.system() == 'Windows', 'Skip on Windows.')
++    @unittest.skipIf(util.is_32bit(), 'Skip on 32bit architectures.')
+     def test_UTCTIME_datetime(self):
+         asn1 = ASN1.ASN1_UTCTIME()
+         # Test get_datetime and set_datetime
+--- a/tests/test_x509.py
++++ b/tests/test_x509.py
+@@ -12,11 +12,10 @@ Author: Heikki Toivonen
+ import base64
+ import logging
+ import os
+-import platform
+ import time
+ import warnings
+ 
+-from M2Crypto import ASN1, BIO, EVP, RSA, Rand, X509, m2, six  # noqa
++from M2Crypto import ASN1, BIO, EVP, RSA, Rand, X509, m2, six, util  # noqa
+ from tests import unittest
+ 
+ log = logging.getLogger(__name__)
+@@ -244,7 +243,7 @@ class X509TestCase(unittest.TestCase):
+         req.set_version(0)
+         self.assertEqual(req.get_version(), 0)
+ 
+-    @unittest.skipIf(platform.system() == 'Windows', 'Skip on Windows.')
++    @unittest.skipIf(util.is_32bit(), 'Skip on 32bit architectures.')
+     def test_mkcert(self):
+         for utc in (True, False):
+             req, pk = self.mkreq(1024)
+@@ -588,12 +587,12 @@ class X509TestCase(unittest.TestCase):
+         self.assertEqual(cert.get_serial_number(),
+                          127614157056681299805556476275995414779)
+ 
+-    @unittest.skipIf(platform.system() == 'Windows', 'Skip on Windows.')
++    @unittest.skipIf(util.is_32bit(), 'Skip on 32bit architectures.')
+     def test_date_after_2050_working(self):
+         cert = X509.load_cert('tests/bad_date_cert.crt')
+         self.assertEqual(str(cert.get_not_after()), 'Feb  9 14:57:46 2116 GMT')
+ 
+-    @unittest.skipIf(platform.system() == 'Windows', 'Skip on Windows.')
++    @unittest.skipIf(util.is_32bit(), 'Skip on 32bit architectures.')
+     def test_date_reference_counting(self):
+         """x509_get_not_before() and x509_get_not_after() return internal
+         pointers into X509. As the returned ASN1_TIME objects do not store any
diff --git a/python-M2Crypto.changes b/python-M2Crypto.changes
index b91b2d6..0191f4c 100644
--- a/python-M2Crypto.changes
+++ b/python-M2Crypto.changes
@@ -27,6 +27,7 @@ Tue Oct 24 15:13:16 UTC 2023 - Matej Cepl <mcepl@cepl.eu>
     CentOS 7 have been included.
   - Introduce m2.err_clear_error()
   - Make X509_verify_cert() accessible as m2.x509_verify_cert
+- Add 32bit_ASN1_Time.patch to quench errors on 32bit archs.
 
 -------------------------------------------------------------------
 Mon Aug  7 13:14:41 UTC 2023 - Matej Cepl <mcepl@suse.com>
diff --git a/python-M2Crypto.spec b/python-M2Crypto.spec
index 41bae24..f7812d0 100644
--- a/python-M2Crypto.spec
+++ b/python-M2Crypto.spec
@@ -27,6 +27,9 @@ URL:            https://gitlab.com/m2crypto/m2crypto
 Source0:        https://files.pythonhosted.org/packages/source/M/M2Crypto/M2Crypto-%{version}.tar.gz
 Source1:        M2Crypto-%{version}.tar.gz.asc
 Source99:       python-M2Crypto.keyring
+# PATCH-FIX-UPSTREAM 32bit_ASN1_Time.patch gl#m2crypto/m2crypto/-#341 mcepl@suse.com
+# Not only Windows but all 32bit archs have fouled ASN1_Time.
+Patch0:         32bit_ASN1_Time.patch
 BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module typing}