diff --git a/configure.ac b/configure.ac
index bcd780c1d7e24a55a6ef30c5c10b7d39b0db0205..bb535b82cb28a611dbd4b5f572d685eff86e714c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@ AC_DEFINE([PACKAGE_URL],["www.swiftsim.com"], [Package web pages])
 AC_COPYRIGHT
 AC_CONFIG_SRCDIR([src/space.c])
 AC_CONFIG_AUX_DIR([.])
-AM_INIT_AUTOMAKE
+AM_INIT_AUTOMAKE([subdir-objects])
 
 # Add local macro collection.
 AC_CONFIG_MACRO_DIR([m4])