diff --git a/setup.py b/setup.py
index 37477216d..a2b2c6910 100755
--- a/setup.py
+++ b/setup.py
@@ -852,7 +852,7 @@ class pil_build_ext(build_ext):
             sys.platform == "win32"
             and sys.version_info < (3, 9)
             and not (PLATFORM_PYPY or PLATFORM_MINGW)
-            and int(setuptools_version.split('.')[0]) < 60
+            and int(setuptools_version.split(".")[0]) < 60
         ):
             defs.append(("PILLOW_VERSION", f'"\\"{PILLOW_VERSION}\\""'))
         else: