--- a/configure.ac
+++ b/configure.ac
@@ -23,7 +23,7 @@ dnl ##    OUT OF THE USE OF THIS SOFTWAR
 dnl ##    SUCH DAMAGE.
 
 
-AC_PREREQ([2.72])
+AC_PREREQ([2.71])
 LT_PREREQ([2.2.0])
 
 AC_INIT([knxd],m4_esyscmd(sh -c "./tools/version.sh | tr -d '\n'"))