diff --git a/mbedtls-enable-pthread.patch b/mbedtls-enable-pthread.patch
new file mode 100644
index 0000000..33b682c
--- /dev/null
+++ b/mbedtls-enable-pthread.patch
@@ -0,0 +1,21 @@
+diff -purN a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
+--- a/include/mbedtls/mbedtls_config.h	2023-03-27 19:05:28.000000000 +0200
++++ b/include/mbedtls/mbedtls_config.h	2023-05-29 19:15:39.917530360 +0200
+@@ -1917,7 +1917,7 @@
+  *
+  * Uncomment this to enable pthread mutexes.
+  */
+-//#define MBEDTLS_THREADING_PTHREAD
++#define MBEDTLS_THREADING_PTHREAD
+ 
+ /**
+  * \def MBEDTLS_USE_PSA_CRYPTO
+@@ -3312,7 +3312,7 @@
+  *
+  * Enable this layer to allow use of mutexes within mbed TLS
+  */
+-//#define MBEDTLS_THREADING_C
++#define MBEDTLS_THREADING_C
+ 
+ /**
+  * \def MBEDTLS_TIMING_C
diff --git a/mbedtls.changes b/mbedtls.changes
index c565e95..80b74be 100644
--- a/mbedtls.changes
+++ b/mbedtls.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Mon May 29 17:41:24 UTC 2023 - Arjen de Korte <suse+build@de-korte.org>
+
+- Remove obsolete CMake options as these are not used in 3.0+
+  (USE_PKCS11_HELPER_LIBRARY, ENABLE_ZLIB_SUPPORT)
+- Enable MBEDTLS_THREADING_C and MBEDTLS_THREADING_PTHREAD (boo#1211810)
+  + mbedtls-enable-pthread.patch
+- Parallel execution of ctest works just fine (no need to limit to
+  one job)
+
 -------------------------------------------------------------------
 Sun May  7 20:44:12 UTC 2023 - Mariusz Fik <fisiu@opensuse.org>
 
diff --git a/mbedtls.spec b/mbedtls.spec
index b3b2902..1c10d0a 100644
--- a/mbedtls.spec
+++ b/mbedtls.spec
@@ -28,11 +28,10 @@ Group:          Development/Libraries/C and C++
 URL:            https://tls.mbed.org
 Source:         %{name}-%{version}.tar.gz
 Source99:       baselibs.conf
+# PATCH-FEATURE-OPENSUSE - enable MBEDTLS_THREADING_PTHREAD and MBEDTLS_THREADING_C
+Patch1:         mbedtls-enable-pthread.patch
 BuildRequires:  cmake
 BuildRequires:  ninja
-BuildRequires:  pkgconfig
-BuildRequires:  pkgconfig(libpkcs11-helper-1)
-BuildRequires:  pkgconfig(zlib)
 %{?suse_build_hwcaps_libs}
 
 %description
@@ -97,10 +96,6 @@ export CXXLAGS="%{optflags} -Wno-stringop-overflow -Wno-maybe-uninitialized"
 %cmake \
   -DUNSAFE_BUILD=ON \
   -DLINK_WITH_PTHREAD=ON \
-  -DMBEDTLS_THREADING_C=ON \
-  -DMBEDTLS_THREADING_PTHREAD=ON \
-  -DUSE_PKCS11_HELPER_LIBRARY=ON \
-  -DENABLE_ZLIB_SUPPORT=ON \
   -DINSTALL_MBEDTLS_HEADERS=ON \
   -DUSE_SHARED_MBEDTLS_LIBRARY=ON \
   -DUSE_STATIC_MBEDTLS_LIBRARY=OFF \
@@ -112,11 +107,9 @@ export CXXLAGS="%{optflags} -Wno-stringop-overflow -Wno-maybe-uninitialized"
 %cmake_install
 
 %check
-# parallel execution fails
-# %%ctest
 pushd build
 LD_LIBRARY_PATH=%{buildroot}%{_libdir} \
- %{_bindir}/ctest --output-on-failure --force-new-ctest-process -j1
+ %{_bindir}/ctest --output-on-failure --force-new-ctest-process
 
 %post -n %{lib_tls}      -p /sbin/ldconfig
 %post -n %{lib_crypto}   -p /sbin/ldconfig