diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
index de85bf9..643026e 100644
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -1421,8 +1421,8 @@
             if self.subst:
                 args = self.subst(*args)
             return self.func(*args)
-        except SystemExit as msg:
-            raise SystemExit(msg)
+        except SystemExit:
+            raise
         except:
             self.widget._report_exception()