diff --git a/MANIFEST.in b/MANIFEST.in
index 7cdf91a0a..0fcbc0cb3 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,9 +4,11 @@ recursive-include gevent *
 recursive-include doc *
 recursive-include libev *
 recursive-include c-ares *
+recursive-include util *
 include LICENSE
 include README.rst
 include TODO
 include changelog.rst
 include MANIFEST.in
 include AUTHORS
+include Makefile.ext