diff --git a/configure.ac b/configure.ac
index fe164e5..4aacea1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_PREREQ([2.72])
+AC_PREREQ([2.70])
 
 AC_CONFIG_AUX_DIR([build-aux])
 AC_REQUIRE_AUX_FILE([git-version-gen])