diff --git a/setup.py b/setup.py
index dcee0b2..42f7b81 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@ setup(name="schainpy",
         ],
       },
       scripts=['schainpy/gui/schainGUI'],
-      ext_modules=[Extension("cSchain", ["schainpy/model/proc/extensions.c"])],
+      ext_modules=[Extension("cSchain", ["schainpy/model/proc/extensions.c"], include_dirs=[numpy.get_include()])],
       install_requires=[
                       "scipy >= 0.14.0",
                       "h5py >= 2.2.1",
@@ -55,3 +55,4 @@ setup(name="schainpy",
                       "python-Levenshtein"
                       ],
       )
+