diff --git a/MANIFEST.in b/MANIFEST.in
index 17192604..9fafe436 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
-include src/*
+recursive-include pybedtools/include/ *
 include README.rst
 include LICENSE.txt
 include ez_setup.py
@@ -6,7 +6,7 @@ recursive-include pybedtools/test/data *
 recursive-include pybedtools/test *
 include docs/Makefile
 include docs/make.bat
-recursive-include pybedtools *.cxx
+recursive-include pybedtools *.cpp
 recursive-include pybedtools *.c
 recursive-exclude * __pycache__
 recursive-exclude * *.py[co]