diff --git a/addons/web/static/src/js/views/pivot_view.js b/addons/web/static/src/js/views/pivot_view.js
index d275e122285..28b3bee2cd2 100644
--- a/addons/web/static/src/js/views/pivot_view.js
+++ b/addons/web/static/src/js/views/pivot_view.js
@@ -57,6 +57,7 @@ var PivotView = View.extend({
         this.headers = {};
         this.cells = {};
         this.has_data = false;
+        this.$buttons = $();
 
         this.last_header_selected = null;
         this.sorted_column = {};