diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 5825eff95d8..c1fa4a5b9e5 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -1034,6 +1034,7 @@ Tkapp_MainLoop (self, args)
 	}
       Tk_DoOneEvent (0);
     }
+  quitMainLoop = 0;
 
   if (errorInCmd)
     {