diff --git a/app/ecs/ecs.js b/app/ecs/ecs.js
index 49d3a40..a698a76 100644
--- a/app/ecs/ecs.js
+++ b/app/ecs/ecs.js
@@ -323,7 +323,7 @@ export default class Ecs {
       promises.push(this.Components[componentName].insertMany(inserting[componentName]));
     }
     await Promise.all(promises);
-    this.reindex(unique.values());
+    this.reindex(unique);
   }
 
   markChange(entityId, components) {
@@ -535,7 +535,7 @@ export default class Ecs {
       promises.push(this.Components[componentName].updateMany(updating[componentName]));
     }
     await Promise.all(promises);
-    this.reindex(unique.values());
+    this.reindex(unique);
   }
 
 }