diff --git a/clutter/clutter-config.h.win32 b/clutter/clutter-config.h.win32
index 433ee5d85..21076fa84 100644
--- a/clutter/clutter-config.h.win32
+++ b/clutter/clutter-config.h.win32
@@ -11,6 +11,7 @@ G_BEGIN_DECLS
 
 #define CLUTTER_WINDOWING_WIN32 "win32"
 #define CLUTTER_INPUT_WIN32 "win32"
+#define CLUTTER_INPUT_NULL "null"
 
 G_END_DECLS