diff --git a/src/wifi/examples/wifi-bianchi.cc b/src/wifi/examples/wifi-bianchi.cc
index cc40bad4b..c1c15945a 100644
--- a/src/wifi/examples/wifi-bianchi.cc
+++ b/src/wifi/examples/wifi-bianchi.cc
@@ -2471,7 +2471,7 @@ Experiment::Run(const WifiHelper& helper,
     phy.SetPcapDataLinkType(WifiPhyHelper::DLT_IEEE802_11_RADIO);
 
     WifiMacHelper mac = wifiMac;
-    WifiHelper wifi = helper;
+    const auto& wifi = helper;
     NetDeviceContainer devices;
     uint32_t nNodes = wifiNodes.GetN();
     if (infra)