diff --git a/MANIFEST.in b/MANIFEST.in
index 3320716f8..24da8604e 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
 recursive-include letsencrypt *.json
 recursive-include letsencrypt *.sh
 recursive-include letsencrypt *.conf
-recursive include letsencrypt/client/tests/testdata *
+recursive-include letsencrypt/client/tests/testdata *