diff --git a/configure.ac b/configure.ac
index 3427b9e..693e520 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,7 @@ AM_PROG_CC_C_O
 AC_HEADER_STDC
 AC_C_CONST
 
-AM_INIT_AUTOMAKE([dist-xz no-dist-gzip])
+AM_INIT_AUTOMAKE([dist-xz no-dist-gzip subdir-objects])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AM_MAINTAINER_MODE([enable])