actually use zlib
diff --git a/configure.ac b/configure.ac
index 110b0cb..1eda608 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,9 +1,18 @@
-AC_INIT([libtelnet], [0.10], [http://github.com/elanthis/libtelnet/tree/master])
+AC_INIT([libtelnet], [0.11], [http://github.com/elanthis/libtelnet/tree/master])
AM_INIT_AUTOMAKE
AC_PROG_CC
AC_PROG_LIBTOOL
+# zlib support
+AC_CHECK_LIB(z,deflate,ZLIB=yes,ZLIB=no)
+if test "x$ZLIB" = "xyes" ; then
+ LIBS="$LIBS -lz"
+ AC_DEFINE(HAVE_ZLIB, 1, [We have zlib])
+ LIBTELNET_HAVE_ZLIB="-DHAVE_ZLIB"
+ AC_SUBST(LIBTELNET_HAVE_ZLIB)
+fi
+
AC_CONFIG_FILES(Makefile)
AC_OUTPUT