--- a/configure.ac	Wed May 02 21:45:52 2018 +0200
+++ b/configure.ac	Thu May 03 09:26:06 2018 +0200
@@ -27,9 +27,8 @@
 #
 
 # the package version must match the macros in ucx.h
-# if you change the version, don't forget to adjust the
-# libtool version-info in src/Makefile.am accordingly
 AC_INIT([ucx], [1.1.0], [olaf.wintermann@gmail.com])
+AC_SUBST([UCX_LIB_VERSION], [2:0:1])
 
 # don't place everything in the project root
 AC_CONFIG_AUX_DIR([build-aux])