diff --git a/addons/web/static/src/js/views/graph/graph_renderer.js b/addons/web/static/src/js/views/graph/graph_renderer.js
index 02fdb102358..89c31075942 100644
--- a/addons/web/static/src/js/views/graph/graph_renderer.js
+++ b/addons/web/static/src/js/views/graph/graph_renderer.js
@@ -215,6 +215,24 @@ return AbstractRenderer.extend({
         }
         return this.state.origins[dataPt.originIndex];
     },
+    /**
+     * Returns an object used to style chart elements independently from the datasets.
+     *
+     * @private
+     * @returns {Object}
+     */
+    _getElementOptions: function () {
+        var elementOptions = {};
+        if (this.state.mode === 'bar') {
+            elementOptions.rectangle = {borderWidth: 1};
+        } else if (this.state.mode === 'line') {
+            elementOptions.line = {
+                tension: 0,
+                fill: false,
+            };
+        }
+        return elementOptions;
+    },
     /**
      * Returns a DateClasses instance used to manage equivalence of dates.
      *
@@ -563,6 +581,7 @@ return AbstractRenderer.extend({
             scales: this._getScaleOptions(),
             legend: this._getLegendOptions(datasetsCount),
             tooltips: this._getTooltipOptions(datasetsCount),
+            elements: this._getElementOptions(),
         };
     },
     /**
@@ -661,9 +680,6 @@ return AbstractRenderer.extend({
     _renderBarChart: function (dataPoints) {
         var self = this;
 
-        // style rectangles
-        Chart.defaults.global.elements.rectangle.borderWidth = 1;
-
         // prepare data
         var data = this._prepareData(dataPoints);
         data.datasets.forEach(function (dataset, index) {
@@ -694,10 +710,6 @@ return AbstractRenderer.extend({
     _renderLineChart: function (dataPoints) {
         var self = this;
 
-        // style lines
-        Chart.defaults.global.elements.line.tension = 0;
-        Chart.defaults.global.elements.line.fill = false;
-
         // prepare data
         var data = this._prepareData(dataPoints);
         data.datasets.forEach(function (dataset, index) {