diff --git a/packages/core/src/ground.js b/packages/core/src/ground.js
index 9f336d6..64f0332 100644
--- a/packages/core/src/ground.js
+++ b/packages/core/src/ground.js
@@ -73,7 +73,7 @@ Ground.prototype._step = function () {
       this.start();
     } else {
       if (!this.backgroundTaskCount) {
-        this.stopHandlers.forEach((h) => h());
+        this.stopHandlers.forEach((h) => h(this));
         this.stopHandlers = [];
       }
     }