diff --git a/Makefile.am b/Makefile.am
index f20897d9..dcbecefa 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -32,6 +32,7 @@ EXTRA_DIST = \
 	Doxyfile.in \
 	extra \
 	doc \
+	dos \
 	windows \
 	COPYING.GPLv2 \
 	COPYING.GPLv3 \