diff --git a/X2UtDelphiCompatibility.pas b/X2UtDelphiCompatibility.pas
index ace2d02..402c23f 100644
--- a/X2UtDelphiCompatibility.pas
+++ b/X2UtDelphiCompatibility.pas
@@ -10,6 +10,10 @@ uses
 
 
 implementation
+{$IF CompilerVersion < 20}
+uses
+  Windows;
+{$ENDIF}
 
 
 function CharInSet(C: Char; const CharSet: TSysCharSet): Boolean;