diff --git a/packages/entity/traits/positioned.js b/packages/entity/traits/positioned.js
index cb6dc46..ba84b7c 100644
--- a/packages/entity/traits/positioned.js
+++ b/packages/entity/traits/positioned.js
@@ -37,6 +37,25 @@ class PositionedBase extends Trait {
     }
   }
 
+  listeners() {
+    return {
+      xChanged: (x, oldX) => {
+        this.entity.emit(
+          'positionChanged',
+          this.entity.position,
+          [oldX, this.entity.y]
+        );
+      },
+      yChanged: (y, oldY) => {
+        this.entity.emit(
+          'positionChanged',
+          this.entity.position,
+          [this.entity.x, oldY]
+        );
+      },
+    }
+  }
+
 }
 
 export class Positioned extends decorate(PositionedBase) {}