diff --git a/setup.py b/setup.py
index 6abde31..4efa34d 100644
--- a/setup.py
+++ b/setup.py
@@ -62,7 +62,9 @@
   version=version,
   packages=find_namespace_packages(where='python'),
   package_dir = {'' : 'python'},
-#  package_data={ 'debug_mgr': package_data },
+  package_data={ 'debug_mgr': [
+      "core.pxd",
+      "decl.pxd" ]},
   author = "Matthew Ballance",
   author_email = "matt.ballance@gmail.com",
   description = ("Simple debug manager for use of C++ Python extensions"),