diff --git a/box.go b/box.go
index 5c9ca88..8bf244e 100644
--- a/box.go
+++ b/box.go
@@ -148,7 +148,10 @@ func (this *box) SetFocusable (focusable bool) {
 }
 
 func (this *box) Focused () bool {
-	return this.outer == this.parent.window().focused
+	if this.parent == nil { return false  }
+	parentWindow := this.parent.window()
+	if parentWindow == nil { return false }
+	return this.outer == parentWindow.focused
 }
 
 func (this *box) Modifiers () input.Modifiers {