diff --git a/packages/fv/examples/testuapp.pas b/packages/fv/examples/testuapp.pas
index 24b433fcaf..9d7101a386 100644
--- a/packages/fv/examples/testuapp.pas
+++ b/packages/fv/examples/testuapp.pas
@@ -4,6 +4,7 @@ program testuapp;
 {$h-}
 
 uses
+  {$ifdef UNIX}fpwidestring,{$endif}
   Objects, UDrivers, UViews, UMenus, UDialogs, UApp, UMsgBox, UInpLong, UTabs, SysUtils;
 
 const