Index: uspace/lib/ui/private/fixed.h
===================================================================
--- uspace/lib/ui/private/fixed.h	(revision fa01c0532bcb8f0b3291b5a02e32606e0515492b)
+++ uspace/lib/ui/private/fixed.h	(revision d55ab8231eb545c1c99c91124cfdc1401993cbe7)
@@ -48,4 +48,6 @@
  */
 struct ui_fixed {
+	/** Base control object */
+	struct ui_control *control;
 	/** Layout elements (ui_fixed_elem_t) */
 	list_t elem;
Index: uspace/lib/ui/private/window.h
===================================================================
--- uspace/lib/ui/private/window.h	(revision fa01c0532bcb8f0b3291b5a02e32606e0515492b)
+++ uspace/lib/ui/private/window.h	(revision d55ab8231eb545c1c99c91124cfdc1401993cbe7)
@@ -63,4 +63,6 @@
 	/** Window decoration */
 	struct ui_wdecor *wdecor;
+	/** Top-level control in the application area */
+	struct ui_control *control;
 };