diff --git a/src/graphs3d/widget/q3dscatterwidgetitem.cpp b/src/graphs3d/widget/q3dscatterwidgetitem.cpp
index 587bd7e2..d426d889 100644
--- a/src/graphs3d/widget/q3dscatterwidgetitem.cpp
+++ b/src/graphs3d/widget/q3dscatterwidgetitem.cpp
@@ -245,7 +245,7 @@ QList<QValue3DAxis *> Q3DScatterWidgetItem::axes() const
 {
     QList<QAbstract3DAxis *> abstractAxes = graphScatter()->axes();
     QList<QValue3DAxis *> retList;
-    for (QAbstract3DAxis *axis : abstractAxes)
+    for (QAbstract3DAxis *axis : std::as_const(abstractAxes))
         retList.append(static_cast<QValue3DAxis *>(axis));
 
     return retList;
diff --git a/src/graphs3d/widget/q3dsurfacewidgetitem.cpp b/src/graphs3d/widget/q3dsurfacewidgetitem.cpp
index 37e731ad..ddb3b880 100644
--- a/src/graphs3d/widget/q3dsurfacewidgetitem.cpp
+++ b/src/graphs3d/widget/q3dsurfacewidgetitem.cpp
@@ -315,7 +315,7 @@ QList<QValue3DAxis *> Q3DSurfaceWidgetItem::axes() const
 {
     QList<QAbstract3DAxis *> abstractAxes = graphSurface()->axes();
     QList<QValue3DAxis *> retList;
-    for (QAbstract3DAxis *axis : abstractAxes)
+    for (QAbstract3DAxis *axis : std::as_const(abstractAxes))
         retList.append(static_cast<QValue3DAxis *>(axis));
 
     return retList;