Make objects in range declarations immutable by default. Avoid unnecessary copying of objects in range declarations.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/qt/trafficgraphwidget.cpp b/src/qt/trafficgraphwidget.cpp
index f087e7569c..3aed3f2b97 100644
--- a/src/qt/trafficgraphwidget.cpp
+++ b/src/qt/trafficgraphwidget.cpp
@@ -141,10 +141,10 @@ void TrafficGraphWidget::updateRates()
     }
 
     float tmax = 0.0f;
-    for (float f : vSamplesIn) {
+    for (const float f : vSamplesIn) {
         if(f > tmax) tmax = f;
     }
-    for (float f : vSamplesOut) {
+    for (const float f : vSamplesOut) {
         if(f > tmax) tmax = f;
     }
     fMax = tmax;