diff --git a/public/js/ff/charts.js b/public/js/ff/charts.js
index c4d42ae173..03b8189cb9 100644
--- a/public/js/ff/charts.js
+++ b/public/js/ff/charts.js
@@ -88,9 +88,7 @@ const verticalLinePlugin = {
 
     afterDatasetsDraw: function (chart, easing) {
         if (chart.config.lineAtIndex) {
-            chart.config.lineAtIndex.forEach(pointIndex = > this.renderVerticalLine(chart, pointIndex)
-        )
-            ;
+            chart.config.lineAtIndex.forEach(pointIndex => this.renderVerticalLine(chart, pointIndex));
         }
     }
 };