diff --git a/pillow_mingw.patch b/pillow_mingw.patch
index 2d98dbf..c08607c 100644
--- a/pillow_mingw.patch
+++ b/pillow_mingw.patch
@@ -6,7 +6,7 @@ diff -rupN --no-dereference Pillow-9.1.1/setup.py Pillow-9.1.1-new/setup.py
  
  
 -PLATFORM_MINGW = os.name == "nt" and "GCC" in sys.version
-+PLATFORM_MINGW = "mingw32" in os.getenv("CC", [])
++PLATFORM_MINGW = "mingw32" in os.getenv("CC", "")
  PLATFORM_PYPY = hasattr(sys, "pypy_version_info")