diff --git a/MANIFEST.in b/MANIFEST.in
index 5f796cf..065c707 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,4 @@
 include README.rst CHANGES.rst
 include thriftpy/protocol/cybin/*.pyx thriftpy/protocol/cybin/*.c thriftpy/protocol/cybin/*.h
+include thriftpy/transport/*/*.pyx thriftpy/transport/*/*.c
 include thriftpy/transport/*.pyx thriftpy/transport/*.pxd thriftpy/transport/*.c
diff --git a/Makefile b/Makefile
index 3d7795c..0faffd4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 build_ext:
 	rm -vf thriftpy/protocol/cybin/*.c thriftpy/protocol/*.so
 	rm -vf thriftpy/transport/*.c thriftpy/transport/*.so
+	rm -vf thriftpy/transport/*/*.c thriftpy/transport/*/*.so
 	rm -vf dist/*
 	python setup.py build_ext
 
diff --git a/setup.py b/setup.py
index 442214f..10b38a4 100644
--- a/setup.py
+++ b/setup.py
@@ -46,6 +46,7 @@
 # only build ext in CPython
 if not PYPY:
     if CYTHON:
+        cythonize("thriftpy/transport/cybase.pyx")
         cythonize("thriftpy/transport/**/*.pyx")
         cythonize("thriftpy/protocol/cybin/cybin.pyx")