diff --git a/src/Makefile.am b/src/Makefile.am
index 49a0c69be..b6c98fc36 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -56,6 +56,8 @@ AM_CFLAGS = \
 	-I$(top_builddir)/src/modules/gconf \
 	-I$(top_srcdir)/src/modules/bluetooth \
 	-I$(top_builddir)/src/modules/bluetooth \
+	-I$(top_srcdir)/src/modules/oss \
+	-I$(top_builddir)/src/modules/oss \
 	-I$(top_srcdir)/src/modules/alsa \
 	-I$(top_builddir)/src/modules/alsa \
 	-I$(top_srcdir)/src/modules/raop \