diff --git a/src/lib/Annotation.js b/src/lib/Annotation.js
index b5cee20b85762000d095402c627f81d6dfa9048f..a30854a65f75530f0ec28bd42f5d8d5e43cfd7cf 100644
--- a/src/lib/Annotation.js
+++ b/src/lib/Annotation.js
@@ -2,8 +2,9 @@ import AnnotationResource from './AnnotationResource';
 /** */
 export default class Annotation {
   /** */
-  constructor(json) {
+  constructor(json, target) {
     this.json = json;
+    this.target = target;
   }
 
   /** */