diff --git a/setup.py b/setup.py
index 82b1de3..9d67df9 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
       author_email='radicek@forsyte.at',
       url='https://github.com/iradicek/clara',
       packages=['clara'],
-      ext_modules = cythonize(extensions),
+      ext_modules = cythonize(extensions, include_path=["./clara"]),
       install_requires=['pycparser', 'zss'],
       scripts=['bin/clara']
      )