diff --git a/MANIFEST.in b/MANIFEST.in
index 309d4fc..105a2d6 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -97,6 +97,7 @@ include  sample/testkd3.cpp
 include  setup.py
 include  src/CMakeLists.txt
 include  src/algo.hpp
+include  src/numpy_adaptors.hpp
 include  src/bqueue.hpp
 include  src/bqueue.tcc
 include  src/bsp_simple.hpp