diff --git a/mercurial/patch.py b/mercurial/patch.py
--- a/mercurial/patch.py
+++ b/mercurial/patch.py
@@ -1165,7 +1165,6 @@ def _applydiff(ui, fp, patcher, changed,
     rejects = 0
     err = 0
     current_file = None
-    cwd = os.getcwd()
     backend = fsbackend(ui, os.getcwd())
 
     for state, values in iterhunks(fp):