diff --git a/Tools/idle/PyShell.py b/Tools/idle/PyShell.py
index d8c3dc1..cc86c2e 100644
--- a/Tools/idle/PyShell.py
+++ b/Tools/idle/PyShell.py
@@ -195,7 +195,7 @@
         text.bind("<<open-stack-viewer>>", self.open_stack_viewer)
 
         sys.stdout = PseudoFile(self, "stdout")
-        ##sys.stderr = PseudoFile(self, "stderr")
+        sys.stderr = PseudoFile(self, "stderr")
         sys.stdin = self
         self.console = PseudoFile(self, "console")