diff --git a/apps/hello/hello.go b/apps/hello/hello.go
index 6394191b..1aa9b417 100644
--- a/apps/hello/hello.go
+++ b/apps/hello/hello.go
@@ -32,6 +32,7 @@ func main() {
 func init() {
 	go func() {
 		for w := range app.Windows() {
+			w := w
 			go func() {
 				if err := loop(w); err != nil {
 					log.Fatal(err)