diff --git a/configure.ac b/configure.ac
index 7771e38dfff36942a7376d4393fcff85be08299c..7442b744995aae31c8f45e303d476c895ced0771 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.59)
-AC_INIT([alberta], [2.1], [Claus.Heine@Mathematik.Uni-Freiburg.DE,kosterdtp@ewi.uwente.nl])
+AC_INIT([alberta], [2.1-BETA], [Claus.Heine@Mathematik.Uni-Freiburg.DE,kosterdtp@ewi.uwente.nl])
 AC_CONFIG_SRCDIR([alberta/src/Common/alberta.h])
 
 AM_MAINTAINER_MODE