diff --git a/pudb/debugger.py b/pudb/debugger.py
index 118904d0..23a434e9 100644
--- a/pudb/debugger.py
+++ b/pudb/debugger.py
@@ -2298,7 +2298,7 @@ def __call__(subself, w, size, key):  # noqa # pylint: disable=no-self-argument
         def quit(w, size, key):
             with open(self.cmdline_history_path, "w") as history:
                 history.write("\n".join(self.cmdline_history))
-            self.debugger.set_quit()
+            sys.settrace(None)
             end()
 
         def do_edit_config(w, size, key):