diff --git a/xorriso/xorriso_makefile_am.txt b/xorriso/xorriso_makefile_am.txt
index 1522dcc4..be807ebb 100644
--- a/xorriso/xorriso_makefile_am.txt
+++ b/xorriso/xorriso_makefile_am.txt
@@ -229,6 +229,7 @@ EXTRA_DIST = \
 	xorriso/changelog.txt \
 	xorriso/xorriso_buildstamp_none.h \
 	$(man_MANS) \
+	libisofs/aaip-os-dummy.c \
 	libisofs/aaip-os-linux.c \
 	libisofs/aaip-os-freebsd.c