diff --git a/configure.ac b/configure.ac
index 404c5591..01d8c6e7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ AC_CANONICAL_TARGET
 
 AC_CONFIG_MACRO_DIR([m4])
 
-AM_INIT_AUTOMAKE()
+AM_INIT_AUTOMAKE([subdir-objects])
 AC_CONFIG_HEADERS([config.h])
 
 dnl Checks for command-line options