diff --git a/Lib/os.py b/Lib/os.py
index dda32135669..e723b075ef3 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -23,6 +23,10 @@ _osindex = {
 	  'mac':   (':', '::', ':', ' ', ':'),
 }
 
+# For freeze.py script:
+if 0:
+	import posix
+
 import sys
 for name in _osindex.keys():
 	if name in sys.builtin_module_names: