diff --git a/osx/macosx-builder.py b/osx/macosx-builder.py
index 0bf6965..3b8a16e 100644
--- a/osx/macosx-builder.py
+++ b/osx/macosx-builder.py
@@ -374,11 +374,10 @@ class MacosxBuilder(object):
             raise Exception(u'Error running bzr log')
         output_ascii = unicode(output, errors=u'ignore')
         latest = output_ascii.split(u':')[0]
-        version_string = u'%s-bzr%s' % (tag, latest)
-        self.version_string = version_string
+        self.version_string = u'%s-bzr%s' % (tag, latest)
         self.version_tag = tag
         version_file = open(os.path.join(self.dist_path, u'.version'), u'w')
-        version_file.write(version_string)
+        version_file.write(self.version_string)
         version_file.close()
 
     def copy_plugins(self):