diff --git a/python310.changes b/python310.changes
index 5dd153f..4d15475 100644
--- a/python310.changes
+++ b/python310.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Aug 30 12:48:25 UTC 2021 - Matej Cepl <mcepl@suse.com>
+
+- Switch on option --with-system-libmpdec (bsc#1189356).
+
 -------------------------------------------------------------------
 Fri Aug 27 13:15:03 UTC 2021 - Andreas Schwab <schwab@suse.de>
 
diff --git a/python310.spec b/python310.spec
index 21e485f..def0180 100644
--- a/python310.spec
+++ b/python310.spec
@@ -76,6 +76,12 @@
 %if "%{_arch}" == "arm"
 %define armsuffix hf
 %endif
+# Decide whether we want to use mpdecimal
+%if 0%{?suse_version} >= 1550
+%bcond_without mpdecimal
+%else
+%bcond_with mpdecimal
+%endif
 # pyexpat.cpython-35m-x86_64-linux-gnu
 # pyexpat.cpython-35m-powerpc64le-linux-gnu
 # pyexpat.cpython-35m-armv7-linux-gnueabihf
@@ -158,6 +164,9 @@ BuildRequires:  pkgconfig(zlib)
 BuildRequires:  pkgconfig(libnsl)
 BuildRequires:  pkgconfig(libtirpc)
 %endif
+%if %{with mpdecimal}
+BuildRequires:  mpdecimal-devel
+%endif
 %if %{with doc}
 BuildRequires:  python3-Sphinx
 %if 0%{?suse_version} >= 1500
@@ -444,6 +453,9 @@ export CFLAGS="%{optflags} -IVendor/"
     --with-lto \
 %if %{with profileopt}
     --enable-optimizations \
+%endif
+%if %{with mpdecimal}
+    --with-system-libmpdec \
 %endif
     --enable-loadable-sqlite-extensions