diff --git a/src/ui/linechart/LinechartWidget.cc b/src/ui/linechart/LinechartWidget.cc
index c0ffd02cdbba11f8350ff9afa64b879226633ce3..84ba2e555a34aea47fd4b0a64b26d973a257720c 100644
--- a/src/ui/linechart/LinechartWidget.cc
+++ b/src/ui/linechart/LinechartWidget.cc
@@ -361,6 +361,7 @@ void LinechartWidget::appendData(int uasId, const QString& curve, const QString&
             timeButton->blockSignals(false);
             if (activePlot) activePlot->enforceGroundTime(true);
         }
+        lastTimestamp = usec;
     }
 
     // Log data