diff --git a/src/mpi/examples/nms-p2p-nix-distributed.cc b/src/mpi/examples/nms-p2p-nix-distributed.cc
index d5f5f9e6d..4a16c05e6 100644
--- a/src/mpi/examples/nms-p2p-nix-distributed.cc
+++ b/src/mpi/examples/nms-p2p-nix-distributed.cc
@@ -149,7 +149,7 @@ main (int argc, char *argv[])
   if (nix)
     {
       Ipv4NixVectorHelper nixRouting;
-      stack.SetRoutingHelper (list); // has effect on the next Install ()
+      stack.SetRoutingHelper (nixRouting); // has effect on the next Install ()
     }
 
   // Create Campus Networks
diff --git a/src/mpi/examples/simple-distributed-empty-node.cc b/src/mpi/examples/simple-distributed-empty-node.cc
index 778364cd5..1643b93b9 100644
--- a/src/mpi/examples/simple-distributed-empty-node.cc
+++ b/src/mpi/examples/simple-distributed-empty-node.cc
@@ -186,7 +186,7 @@ main (int argc, char *argv[])
   if (nix)
     {
       Ipv4NixVectorHelper nixRouting;
-      stack.SetRoutingHelper (list); // has effect on the next Install ()
+      stack.SetRoutingHelper (nixRouting); // has effect on the next Install ()
     }
 
   stack.InstallAll ();
diff --git a/src/mpi/examples/simple-distributed.cc b/src/mpi/examples/simple-distributed.cc
index 761a6b054..20fee962f 100644
--- a/src/mpi/examples/simple-distributed.cc
+++ b/src/mpi/examples/simple-distributed.cc
@@ -162,7 +162,7 @@ main (int argc, char *argv[])
   if (nix)
     {
       Ipv4NixVectorHelper nixRouting;
-      stack.SetRoutingHelper (list); // has effect on the next Install ()
+      stack.SetRoutingHelper (nixRouting); // has effect on the next Install ()
     }
 
   stack.InstallAll ();