diff --git a/src/interaction/InteractionManager.js b/src/interaction/InteractionManager.js
index 29a8a5e..b1a9c41 100644
--- a/src/interaction/InteractionManager.js
+++ b/src/interaction/InteractionManager.js
@@ -11,7 +11,7 @@
     interactiveTarget
 );
 
-const MOUSE_POINTER_ID = 'MOUSE';
+const MOUSE_POINTER_ID = 1;
 
 // helpers for hitTest() - only used inside hitTest()
 const hitTestEvent = {