diff --git a/MANIFEST.in b/MANIFEST.in
index d940e60f3e..e8b4d37307 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,6 +3,7 @@ include LICENSE
 include etc/requirements*.txt
 recursive-include zipline *.pyi
 recursive-include zipline *.pxi
+recursive-include zipline *.pxd
 
 recursive-include zipline/resources *.*
 include versioneer.py