diff --git a/macros/autogen.sh b/macros/autogen.sh
index 4c69a06cc2..a3eece2ed9 100644
--- a/macros/autogen.sh
+++ b/macros/autogen.sh
@@ -167,7 +167,7 @@ do
       automake --add-missing --gnu $am_opt ||
 	{ echo "**Error**: automake failed."; exit 1; }
       echo "Running autoconf ..."
-      autoconf2.50 || { echo "**Error**: autoconf failed."; exit 1; }
+      autoconf || { echo "**Error**: autoconf failed."; exit 1; }
     ) || exit 1
   fi
 done