diff --git a/addons/im_livechat/static/src/legacy/widgets/livechat_button.js b/addons/im_livechat/static/src/legacy/widgets/livechat_button.js
index 8067ecbfed2..eabcb581033 100644
--- a/addons/im_livechat/static/src/legacy/widgets/livechat_button.js
+++ b/addons/im_livechat/static/src/legacy/widgets/livechat_button.js
@@ -98,7 +98,7 @@ const LivechatButton = Widget.extend({
      */
     _addMessage(data, options) {
         options = Object.assign({}, this.options, options, {
-            serverURL: this.messaging.livechatButtonView.serverURL,
+            serverURL: this.messaging.livechatButtonView.serverUrl,
         });
         const message = new WebsiteLivechatMessage(this, data, options);