diff --git a/packages/ecs/src/query.js b/packages/ecs/src/query.js
index 4472000..0f03408 100644
--- a/packages/ecs/src/query.js
+++ b/packages/ecs/src/query.js
@@ -32,6 +32,16 @@ export default class Query {
   }
 
   reindex(entities) {
+    if (0 === this.$$compiled.with.length && 0 === this.$$compiled.without.length) {
+      for (let i = 0; i < entities.length; ++i) {
+        const entity = entities[i];
+        const index = this.$$index.indexOf(entity);
+        if (-1 === index) {
+          this.$$index.push(entity);
+        }
+      }
+      return;
+    }
     for (let i = 0; i < entities.length; ++i) {
       const entity = entities[i];
       const index = this.$$index.indexOf(entity);