diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index 74e3cb2b568..8cdefaa635b 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -408,6 +408,9 @@ def __exit__(self, exc, value, tb):
             result = self.file.__exit__(exc, value, tb)
             self.close()
             return result
+    else:
+        def __exit__(self, exc, value, tb):
+            pass
 
 
 def NamedTemporaryFile(mode='w+b', buffering=-1, encoding=None,