Index: openacs-4/packages/chat/www/room-edit.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/chat/www/room-edit.tcl,v
diff -u -r1.15.2.4 -r1.15.2.5
--- openacs-4/packages/chat/www/room-edit.tcl	13 May 2019 10:02:55 -0000	1.15.2.4
+++ openacs-4/packages/chat/www/room-edit.tcl	2 Mar 2021 14:48:21 -0000	1.15.2.5
@@ -67,10 +67,11 @@
         {value "f"}
         {help_text "[_ chat.LogoutMessagesHelp]"}
     }
-    {messages_time_window:integer
+    {messages_time_window:integer(number)
         {label "#chat.MessagesTimeWindow#" }
         {help_text "[_ chat.MessagesTimeWindowHelp]"}
         {value "$four_hours"}
+        {html {min 0 max 2147483647}}
     }
     {avatar_p:boolean(radio)
         {label "#chat.ShowAvatar#" }