diff --git a/components/tvplanit/source/vpcalendar.pas b/components/tvplanit/source/vpcalendar.pas
index cccb33973..b5c9fe704 100644
--- a/components/tvplanit/source/vpcalendar.pas
+++ b/components/tvplanit/source/vpcalendar.pas
@@ -34,7 +34,10 @@ unit VpCalendar;
 interface
 
 uses
-  {$IFDEF LCL}    windows,
+  {$IFDEF LCL}
+  {$IFDEF WINDOWS}
+  Windows,
+  {$ENDIF}
   LMessages, LCLProc, LCLType, LCLIntf, LazUTF8,
   {$ELSE}
   Windows,
diff --git a/components/tvplanit/source/vpedelem.pas b/components/tvplanit/source/vpedelem.pas
index 24e32d2b8..ff80c8339 100644
--- a/components/tvplanit/source/vpedelem.pas
+++ b/components/tvplanit/source/vpedelem.pas
@@ -26,7 +26,7 @@
 {*                                                                            *}
 {* ***** END LICENSE BLOCK *****                                              *}
 
-{$I Vp.INC}
+{$I vp.inc}
 
 unit VpEdElem;
 
diff --git a/components/tvplanit/source/vpreg.pas b/components/tvplanit/source/vpreg.pas
index 0302ed005..5c7a8eb39 100644
--- a/components/tvplanit/source/vpreg.pas
+++ b/components/tvplanit/source/vpreg.pas
@@ -27,7 +27,7 @@
 {* ***** END LICENSE BLOCK *****                                              *}
 
 {$I Vp.INC}    { Compiler Version Defines }
-{$R VpREG.RES} { Palette Glyphs           }
+{$R vpreg.res} { Palette Glyphs           }
 
 unit VpReg;
   {Registration unit for the Visual PlanIt design-time interface}
diff --git a/components/tvplanit/source/vpsr.pas b/components/tvplanit/source/vpsr.pas
index 26cfaa59c..697f2148a 100644
--- a/components/tvplanit/source/vpsr.pas
+++ b/components/tvplanit/source/vpsr.pas
@@ -35,7 +35,7 @@ unit VpSR;
 
 interface
 
-{$I VpSR.INC}
+{$I vpsr.inc}
 
 type
   { For acquiring the labels that go with each telephone field }