diff --git a/components/rx/rxstrutils.pas b/components/rx/rxstrutils.pas
index e3adf60b1..ede934616 100644
--- a/components/rx/rxstrutils.pas
+++ b/components/rx/rxstrutils.pas
@@ -245,7 +245,7 @@ const
 
 implementation
 
-{$IFDEF WIN32}
+{$IFDEF WINDOWS}
 uses Windows;
 {$ENDIF}