diff --git a/lcl/interfaces/win32/win32themes.pas b/lcl/interfaces/win32/win32themes.pas
index 44264fe2ac..0d19d64d93 100644
--- a/lcl/interfaces/win32/win32themes.pas
+++ b/lcl/interfaces/win32/win32themes.pas
@@ -1,6 +1,7 @@
 unit Win32Themes;
 
 {$mode objfpc}{$H+}
+{$I win32defines.inc}
 
 interface