diff -r 976381a3bd9e -r 273d15e0f301 configure.ac
--- a/configure.ac	Mon Oct 27 14:19:49 2014 +0100
+++ b/configure.ac	Mon Oct 27 14:33:03 2014 +0100
@@ -41,7 +41,7 @@
 #
 AC_INIT([ethercat],[1.5.2],[fp@igh-essen.com])
 AC_CONFIG_AUX_DIR([autoconf])
-AM_INIT_AUTOMAKE([-Wall -Werror dist-bzip2])
+AM_INIT_AUTOMAKE([-Wall -Werror dist-bzip2 subdir-objects])
 AC_PREFIX_DEFAULT([/opt/etherlab])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_SRCDIR([config.h.in])