diff --git a/Lib/tkinter/simpledialog.py b/Lib/tkinter/simpledialog.py
index 538bbfc318d704..60cbf8f84c9737 100644
--- a/Lib/tkinter/simpledialog.py
+++ b/Lib/tkinter/simpledialog.py
@@ -176,6 +176,7 @@ def buttonbox(self):
         w.pack(side=LEFT, padx=5, pady=5)
 
         self.bind("<Return>", self.ok)
+        self.bind("<KP_Enter>", self.ok)
         self.bind("<Escape>", self.cancel)
 
         box.pack()