diff --git a/setup.py b/setup.py
index 8f447d5c38169..8e25705c1f4c3 100755
--- a/setup.py
+++ b/setup.py
@@ -387,8 +387,7 @@ def build_extension(self, ext):
 
 
 class DummyBuildSrc(Command):
-    """ numpy's build_src command interferes with Cython's build_ext.
-    """
+    """numpy's build_src command interferes with Cython's build_ext."""
 
     user_options = []