diff --git a/ui/app/os_js.go b/ui/app/os_js.go
index 33f92155..0b5fe9ae 100644
--- a/ui/app/os_js.go
+++ b/ui/app/os_js.go
@@ -14,7 +14,6 @@ import (
 
 type window struct {
 	window                js.Value
-	parent                js.Value
 	cnv                   js.Value
 	tarea                 js.Value
 	w                     *Window