diff --git a/libpst.spec b/libpst.spec
index ee6d6a4..5b64f5f 100644
--- a/libpst.spec
+++ b/libpst.spec
@@ -15,10 +15,12 @@
 Summary:            Utilities to convert Outlook .pst files to other formats
 Name:               libpst
 Version:            0.6.76
-Release:            3%{?dist}
+Release:            4%{?dist}
 License:            GPLv2+
 URL:                http://www.five-ten-sg.com/%{name}/
 Source:             %{url}/packages/%{name}-%{version}.tar.gz
+# https://github.com/autoconf-archive/autoconf-archive/pull/235
+Patch0:             m4-python310.patch
 
 BuildRequires:      make
 BuildRequires:      libtool gcc-c++
@@ -132,6 +134,7 @@ libpst utilities.
 
 %prep
 %setup -q
+%patch0 -p1
 
 
 %build
@@ -215,6 +218,9 @@ rm %{buildroot}%{_mandir}/man1/pst2dii.1*
 
 
 %changelog
+* Thu Aug 05 2021 Yaakov Selkowitz <yselkowi@redhat.com> - 0.6.76-4
+- Add m4 patches for Python 3.10
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.6.76-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild
 
diff --git a/m4-python310.patch b/m4-python310.patch
new file mode 100644
index 0000000..ed8aab4
--- /dev/null
+++ b/m4-python310.patch
@@ -0,0 +1,28 @@
+https://github.com/autoconf-archive/autoconf-archive/pull/235
+
+diff --git a/m4/ax_python_devel.m4 b/m4/ax_python_devel.m4
+index 9d4eecf7..d30ee943 100644
+--- a/m4/ax_python_devel.m4
++++ b/m4/ax_python_devel.m4
+@@ -190,7 +190,7 @@ EOD`
+ 				ac_python_version=$PYTHON_VERSION
+ 			else
+ 				ac_python_version=`$PYTHON -c "import sys; \
+-					print (sys.version[[:3]])"`
++					print ("%d.%d" % sys.version_info[[:2]])"`
+ 			fi
+ 		fi
+ 
+diff --git a/m4/ax_python.m4 b/m4/ax_python.m4
+index 7c9f511f..c2577905 100644
+--- a/m4/ax_python.m4
++++ b/m4/ax_python.m4
+@@ -55,7 +55,7 @@
+ AC_DEFUN([AX_PYTHON],
+ [AC_MSG_CHECKING(for python build information)
+ AC_MSG_RESULT([])
+-for python in python3.9 python3.8 python3.7 python3.6 python3.5 python3.3 python3.2 python3.1 python3.0 python2.7 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python; do
++for python in python3.11 python3.10 python3.9 python3.8 python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python2.7 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python; do
+ AC_CHECK_PROGS(PYTHON_BIN, [$python])
+ ax_python_bin=$PYTHON_BIN
+ if test x$ax_python_bin != x; then