diff --git a/src/qt/trafficgraphwidget.cpp b/src/qt/trafficgraphwidget.cpp
index 1588be8da..006007be6 100644
--- a/src/qt/trafficgraphwidget.cpp
+++ b/src/qt/trafficgraphwidget.cpp
@@ -104,6 +104,7 @@ void TrafficGraphWidget::paintEvent(QPaintEvent *)
         }
     }
 
+    painter.setRenderHint(QPainter::Antialiasing);
     if(!vSamplesIn.empty()) {
         QPainterPath p;
         paintPath(p, vSamplesIn);