diff --git a/components/virtualtreeview/virtualtrees.pas b/components/virtualtreeview/virtualtrees.pas
index b900b3b06..251719d98 100644
--- a/components/virtualtreeview/virtualtrees.pas
+++ b/components/virtualtreeview/virtualtrees.pas
@@ -1,4 +1,4 @@
-unit VirtualTrees;
+unit VirtualTrees;
 
 // Version 4.0.17
 //
@@ -70,7 +70,7 @@ interface
 {.$define UseLocalMemoryManager}
 
 uses
-  LCLProc, LCLType, Types, LMessages, LCLIntf, SysUtils, Classes, opbitmap, lazbridge, Graphics, Controls, Forms, ImgList, {ActiveX,} StdCtrls, Menus, Printers,
+  LCLProc, LCLType, Types, LMessages, LCLIntf, SysUtils, Classes, vt_opbitmap, vt_lazbridge, Graphics, Controls, Forms, ImgList, {ActiveX,} StdCtrls, Menus, Printers,
   LResources, GraphType, CustomTimer,
   SyncObjs, // critical sections
   CommCtrl  // image lists, common controls tree structures
diff --git a/components/virtualtreeview/lazbridge.pas b/components/virtualtreeview/vt_lazbridge.pas
similarity index 100%
rename from components/virtualtreeview/lazbridge.pas
rename to components/virtualtreeview/vt_lazbridge.pas
diff --git a/components/virtualtreeview/opbitmap.pas b/components/virtualtreeview/vt_opbitmap.pas
similarity index 100%
rename from components/virtualtreeview/opbitmap.pas
rename to components/virtualtreeview/vt_opbitmap.pas