diff --git a/ChartsDemo/Swift/Demos/LineChart1ViewController.swift b/ChartsDemo/Swift/Demos/LineChart1ViewController.swift
index bf5eb7f67d..6f34b8b763 100644
--- a/ChartsDemo/Swift/Demos/LineChart1ViewController.swift
+++ b/ChartsDemo/Swift/Demos/LineChart1ViewController.swift
@@ -126,7 +126,7 @@ class LineChart1ViewController: DemoBaseViewController {
         set1.valueFont = .systemFont(ofSize: 9)
         set1.formLineDashLengths = [5, 2.5]
         set1.formLineWidth = 1
-        set1.formLineWidth = 15
+        set1.formSize = 15
         
         let gradientColors = [ChartColorTemplates.colorFromString("#00ff0000").cgColor,
                               ChartColorTemplates.colorFromString("#ffff0000").cgColor]