diff --git a/setup.py b/setup.py
index 076af82c..497429d0 100644
--- a/setup.py
+++ b/setup.py
@@ -24,8 +24,8 @@ setup(name = 'GPy',
       package_data = {'GPy': ['GPy/examples']},
       py_modules = ['GPy.__init__'],
       long_description=read('README.md'),
-      ext_modules =  [Extension(name = 'GPy.kern.lfmUpsilonf2py',
-                sources = ['GPy/kern/src/lfmUpsilonf2py.f90'])],
+      #ext_modules =  [Extension(name = 'GPy.kern.lfmUpsilonf2py',
+      #          sources = ['GPy/kern/src/lfmUpsilonf2py.f90'])],
       install_requires=['numpy>=1.6', 'scipy>=0.9','matplotlib>=1.1'],
       setup_requires=['sphinx'],
       cmdclass = {'build_sphinx': BuildDoc},