--- lazarus-2.2.4--orig/lazarus/lcl/interfaces/gtk3/gtk3boxes.pas	2022-09-25 12:37:18.000000000 +0200
+++ lazarus-2.2.4--patched/lazarus/lcl/interfaces/gtk3/gtk3boxes.pas	2022-12-21 18:46:07.163316917 +0100
@@ -1,11 +1,13 @@
 unit gtk3boxes;
 
+{$MODE OBJFPC} {$LONGSTRINGS ON}
+
 interface
 
 uses
   // LazUtils
-  UITypes,
+  System.UITypes,
   // LCL
   LCLType, LCLStrConsts,LCLProc, InterfaceBase,
   LazGtk3, LazGLib2, LazGObject2, LazGdk3, gtk3objects;