diff --git a/Lib/_pyrepl/fancy_termios.py b/Lib/_pyrepl/fancy_termios.py
index 056437b21f3a76..0468b9a2670267 100644
--- a/Lib/_pyrepl/fancy_termios.py
+++ b/Lib/_pyrepl/fancy_termios.py
@@ -40,6 +40,8 @@ def as_list(self):
             self.lflag,
             self.ispeed,
             self.ospeed,
+            # Always return a copy of the control characters list to ensure
+            # there are not any additional references to self.cc
             self.cc[:],
         ]