diff --git a/game/aw.go b/game/aw.go
index 5a7554b..1a2dbad 100644
--- a/game/aw.go
+++ b/game/aw.go
@@ -10,16 +10,16 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/inpututil"
 )
 
-var (
-	_ engine.Identifier  = &Awakeman{}
-	_ engine.Drawer      = &Awakeman{} // provided by Sprite
-	_ engine.DrawOrderer = &Awakeman{} // provided by Sprite
-	_ engine.Disabler    = &Awakeman{}
-	_ engine.Hider       = &Awakeman{} // provided by Sprite
-	_ engine.Prepper     = &Awakeman{}
-	_ engine.Scanner     = &Awakeman{}
-	_ engine.Updater     = &Awakeman{}
-)
+var _ interface {
+	engine.Identifier
+	engine.Drawer      // provided by Sprite
+	engine.DrawOrderer // provided by Sprite
+	engine.Disabler
+	engine.Hider // provided by Sprite
+	engine.Prepper
+	engine.Scanner
+	engine.Updater
+} = &Awakeman{}
 
 func init() {
 	gob.Register(&Awakeman{})