diff --git a/python/setup.py b/python/setup.py
index a9df075e7becd..5fbef995f7295 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -186,6 +186,9 @@ def get_option_from_sys_argv(option_str):
         extra_compile_args.append('-Wno-invalid-offsetof')
         extra_compile_args.append('-Wno-sign-compare')
 
+    if sys.platform == 'darwin':
+      os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.9'
+
     # https://github.com/Theano/Theano/issues/4926
     if sys.platform == 'win32':
       extra_compile_args.append('-D_hypot=hypot')