diff --git a/Makefile.am b/Makefile.am
index 3c5e958..a5ef764 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,5 @@
 ACLOCAL_AMFLAGS = -I m4
+AUTOMAKE_OPTIONS = subdir-objects
 
 AM_CPPFLAGS = \
     -I$(top_srcdir)/libAACdec/include \