diff --git a/cython/gtsam_unstable/__init__.py b/cython/gtsam_unstable/__init__.py
index 04ce7f1e0..3195e6da4 100644
--- a/cython/gtsam_unstable/__init__.py
+++ b/cython/gtsam_unstable/__init__.py
@@ -1,2 +1 @@
 from .gtsam_unstable import *
-
diff --git a/cython/setup.py.in b/cython/setup.py.in
index 0e22dbf11..e631d89c0 100644
--- a/cython/setup.py.in
+++ b/cython/setup.py.in
@@ -21,8 +21,12 @@ setup(
         'Intended Audience :: Education',
         'Intended Audience :: Developers',
         'Intended Audience :: Science/Research',
+        'Operating System :: MacOS',
+        'Operating System :: Microsoft :: Windows',
+        'Operating System :: POSIX',
         'License :: OSI Approved :: BSD License',
-        'Programming Language :: Python :: ${PYTHON_VERSION_MAJOR}',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 3',
     ],
 
     packages=packages,
@@ -32,5 +36,5 @@ setup(
     },
     install_requires=[line.strip() for line in '''
 ${CYTHON_INSTALL_REQUIREMENTS}
-'''.splitlines() if len(line) > 0 and not line.strip().startswith('#')]
+'''.splitlines() if len(line.strip()) > 0 and not line.strip().startswith('#')]
 )