diff --git a/src/build_osx.py b/src/build_osx.py
index 1d8f470e..7ab74dc2 100644
--- a/src/build_osx.py
+++ b/src/build_osx.py
@@ -1,3 +1,4 @@
+"""Building osx."""
 from glob import glob
 import os
 from PyQt4 import QtCore
@@ -17,15 +18,15 @@ DATA_FILES = [
 ]
 
 setup(
-    name = name,
-    version = version,
-    app = mainscript,
-    data_files = DATA_FILES,
-    setup_requires = ["py2app"],
-    options = dict(
-        py2app = dict(
-            includes = ['sip', 'PyQt4._qt'],
-            iconfile = "images/bitmessage.icns"
+    name=name,
+    version=version,
+    app=mainscript,
+    data_files=DATA_FILES,
+    setup_requires=["py2app"],
+    options=dict(
+        py2app=dict(
+            includes=['sip', 'PyQt4._qt'],
+            iconfile="images/bitmessage.icns"
         )
     )
 )