diff --git a/lcl/lcltaskdialog.pas b/lcl/lcltaskdialog.pas
index 41c0b1a8b5..c1a93da433 100644
--- a/lcl/lcltaskdialog.pas
+++ b/lcl/lcltaskdialog.pas
@@ -415,7 +415,9 @@ function DefaultFont: TFont;
 
 implementation
 
+{$IFDEF WINDOWS}
 Function LoadIconWithScaleDown( hinst:HINST; pszName:LPCWStr;cx:cint;cy:cint;var phico: HICON ):HRESULT; stdcall; external 'comctl32.dll' name 'LoadIconWithScaleDown';
+{$ENDIF}
 
 var
   LDefaultFont: TFont;