diff --git a/src/structures/Message.js b/src/structures/Message.js
index 440552f95..ccfe5e098 100644
--- a/src/structures/Message.js
+++ b/src/structures/Message.js
@@ -148,7 +148,7 @@ class Message {
      * Group activity
      * @type {?Object}
      */
-    this.activiy = data.activity ? {
+    this.activity = data.activity ? {
       partyID: data.activity.party_id,
       type: data.activity.type,
     } : null;