diff --git a/rtems/config/tools/rtems-kernel-4.11.cfg b/rtems/config/tools/rtems-kernel-4.11.cfg
index 84bcb6f..ffd03d6 100644
--- a/rtems/config/tools/rtems-kernel-4.11.cfg
+++ b/rtems/config/tools/rtems-kernel-4.11.cfg
@@ -4,9 +4,17 @@
 
 %include %{_configdir}/checks.cfg
 %include %{_configdir}/base.cfg
+%include %{_configdir}/versions.cfg
 
 %define rtems_kernel_version 4.11
 
+#
+# Check the version of autoconf.
+#
+%if %{__autoconf_ver} <= 2.68
+ %error Autoconf version 2.69 or higher is needed.
+%endif
+
 #
 # Pull the latest changes from git each build. Override if this is not what you
 # want.
diff --git a/source-builder/config/versions.cfg b/source-builder/config/versions.cfg
index 91a1d3d..0e574ff 100644
--- a/source-builder/config/versions.cfg
+++ b/source-builder/config/versions.cfg
@@ -1,5 +1,7 @@
 # Generate version strings.
 
 %define __makeinfo_ver          %(%{__makeinfo} --version | %{__awk} 'NR==1 {print $NF}')
+%define __autoconf_ver          %(%{__autoconf} --version | %{__awk} 'NR==1 {print $NF}')
+%define __automake_ver          %(%{__automake} --version | %{__awk} 'NR==1 {print $NF}')