diff --git a/System/Libraries/Gui.HC b/System/Libraries/Gui.HC
index 7bdd309..26f4a97 100644
--- a/System/Libraries/Gui.HC
+++ b/System/Libraries/Gui.HC
@@ -46,6 +46,7 @@ class @widget_origin
 
 class Widget {
     Bool change;
+    Bool disabled;
     I64 id;
     I64 type;
     I64 x;