diff --git a/examples/ndn-triangle-calculate-routes.cpp b/examples/ndn-triangle-calculate-routes.cpp
index 41a830b..869d443 100644
--- a/examples/ndn-triangle-calculate-routes.cpp
+++ b/examples/ndn-triangle-calculate-routes.cpp
@@ -33,7 +33,7 @@
   // setting default parameters for PointToPoint links and channels
   Config::SetDefault("ns3::PointToPointNetDevice::DataRate", StringValue("1Mbps"));
   Config::SetDefault("ns3::PointToPointChannel::Delay", StringValue("10ms"));
-  Config::SetDefault("ns3::QueueBase::MaxPackets", UintegerValue(20));
+  Config::SetDefault("ns3::QueueBase::MaxSize", StringValue("20p"));
 
   // Read optional command-line parameters (e.g., enable visualizer with ./waf --run=<> --visualize
   CommandLine cmd;