diff --git a/setup.py b/setup.py
index 0d44169..6b04684 100644
--- a/setup.py
+++ b/setup.py
@@ -65,4 +65,5 @@ def build_extension(self, ext):
     ext_modules=[CMakeExtension('pywincalc')],
     cmdclass=dict(build_ext=CMakeBuild),
     zip_safe=False,
+    include_package_data=True,
 )