Issue #12288: Consider '0' and '0.0' as valid initialvalue for tkinter SimpleDialog.
diff --git a/Misc/ACKS b/Misc/ACKS
index e04677e..1a094a1 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -633,6 +633,7 @@
 Mike Meyer
 Steven Miale
 Trent Mick
+Tom Middleton
 Stan Mihai
 Stefan Mihaila
 Aristotelis Mikropoulos