diff --git a/app/lib/surface/SpriteBoss.coffee b/app/lib/surface/SpriteBoss.coffee
index 2ccbcabf3..8a9823b89 100644
--- a/app/lib/surface/SpriteBoss.coffee
+++ b/app/lib/surface/SpriteBoss.coffee
@@ -40,7 +40,7 @@ module.exports = class SpriteBoss extends CocoClass
     @spriteSheetCache = {}
 
   destroy: ->
-    @removeSprite sprite for sprite in @spriteArray
+    @removeSprite sprite for thangID, sprite of @sprites
     @targetMark?.destroy()
     @selectionMark?.destroy()
     super()