1 files changed, 2 insertions, 0 deletions
diff --git a/gflib/window.h b/gflib/window.h
index 6e26155c0..3eac75a28 100644
--- a/gflib/window.h
+++ b/gflib/window.h
@@ -37,6 +37,8 @@ struct WindowTemplate
     0,                              \
 }
 
+#define WINDOW_NONE 0xFF
+
 struct Window
 {
     struct WindowTemplate window;