diff --git a/packages/math/vector/mixin.js b/packages/math/vector/mixin.js
index 30db327..5defdfd 100644
--- a/packages/math/vector/mixin.js
+++ b/packages/math/vector/mixin.js
@@ -25,7 +25,7 @@ export function VectorMixin(
   meta.initialize = function() {
     this[transformedProperty] = Vector.copy(meta.default);
   };
-  const bypass = `${vectorKey}$bypassChangedEvent`;
+  const bypass = `${transformedProperty}$bypassChangedEvent`;
   meta.set = meta.set || new Function('vector', `
     this.${transformedProperty} = [
       this.${transformedProperty}[0],