diff --git a/components/virtualtreeview/virtualtrees.pas b/components/virtualtreeview/virtualtrees.pas
index 251719d98..0a490053c 100644
--- a/components/virtualtreeview/virtualtrees.pas
+++ b/components/virtualtreeview/virtualtrees.pas
@@ -1,4 +1,4 @@
-unit VirtualTrees;
+unit VirtualTrees;
 
 // Version 4.0.17
 //
diff --git a/components/virtualtreeview/vt_lazbridge.pas b/components/virtualtreeview/vt_lazbridge.pas
index 092dde5ae..cf2b22ba9 100644
--- a/components/virtualtreeview/vt_lazbridge.pas
+++ b/components/virtualtreeview/vt_lazbridge.pas
@@ -1,4 +1,4 @@
-unit lazbridge;
+unit vt_lazbridge;
 
 { *************************************************************************** }
 { Copyright (c) 2007 Theo Lustenberger                                        }
@@ -19,7 +19,7 @@ interface
 
 uses Classes, SysUtils, Graphics, GraphType, InterfaceBase, LCLType,
   IntfGraphics, FPimage, LCLIntf, ExtDlgs, FileUtil, ExtCtrls,
-  opbitmap {$IFNDEF VER_VTV} , opbitmapformats  {$ENDIF};
+  vt_opbitmap {$IFNDEF VER_VTV} , opbitmapformats  {$ENDIF};
 
 
 type
diff --git a/components/virtualtreeview/vt_opbitmap.pas b/components/virtualtreeview/vt_opbitmap.pas
index 0cfeda22a..72d4d4c6d 100644
--- a/components/virtualtreeview/vt_opbitmap.pas
+++ b/components/virtualtreeview/vt_opbitmap.pas
@@ -1,4 +1,4 @@
-unit opbitmap;
+unit vt_opbitmap;
 
 { *************************************************************************** }
 { Copyright (c) 2007 Theo Lustenberger                                        }