diff --git a/.gitignore b/.gitignore
index a5fb6afe..cf5868ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@ Makefile
 *.lo
 *.a
 *.la
+.dirstamp
 .deps/
 .libs/
 
diff --git a/configure.ac b/configure.ac
index b6e1e8c5..c990a4ab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ AC_INIT([forked-daapd], [20.0])
 AC_CONFIG_SRCDIR([config.h.in])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADERS([config.h])
-AM_INIT_AUTOMAKE([-Wno-portability])
+AM_INIT_AUTOMAKE([-Wno-portability subdir-objects])
 
 AC_USE_SYSTEM_EXTENSIONS