diff --git a/Lib/lib2to3/patcomp.py b/Lib/lib2to3/patcomp.py
index 4e79ed26923..f57f4954b26 100644
--- a/Lib/lib2to3/patcomp.py
+++ b/Lib/lib2to3/patcomp.py
@@ -12,7 +12,6 @@
 
 # Python imports
 import io
-import os
 
 # Fairly local imports
 from .pgen2 import driver, literals, token, tokenize, parse, grammar