diff --git a/addons/web_graph/static/src/js/graph_widget.js b/addons/web_graph/static/src/js/graph_widget.js
index ac2a581616d..78fa7ceff22 100644
--- a/addons/web_graph/static/src/js/graph_widget.js
+++ b/addons/web_graph/static/src/js/graph_widget.js
@@ -376,7 +376,7 @@ openerp.web_graph.Graph = openerp.web.Widget.extend({
         this.$('.graph_main_content svg').remove();
         this.$('.graph_main_content div').remove();
         this.table.empty();
-        this.table.toggleClass('heatmap', this.heatmap_mode !== 'none')
+        this.table.toggleClass('heatmap', this.heatmap_mode !== 'none');
         this.width = this.$el.width();
         this.height = Math.min(Math.max(document.documentElement.clientHeight - 116 - 60, 250), Math.round(0.8*this.$el.width()));