diff --git a/ModuleKit/Widgets/LineChart.swift b/ModuleKit/Widgets/LineChart.swift
index dc548fe8..485facd8 100644
--- a/ModuleKit/Widgets/LineChart.swift
+++ b/ModuleKit/Widgets/LineChart.swift
@@ -251,7 +251,9 @@ public class LineChart: Widget {
     public override func setValues(_ values: [value_t]) {
         let historyValues = values.map{ $0.widget_value }.suffix(60)
         let end = self.chart.points!.count
-        self.chart.points!.replaceSubrange(end-historyValues.count...end-1, with: historyValues)
+        if historyValues.count != 0 {
+            self.chart.points!.replaceSubrange(end-historyValues.count...end-1, with: historyValues)
+        }
         self.display()
     }