diff --git a/examples/simple-p2p.cc b/examples/simple-p2p.cc
index 3b2e123e6..9a50f4b09 100644
--- a/examples/simple-p2p.cc
+++ b/examples/simple-p2p.cc
@@ -149,7 +149,7 @@ int main (int argc, char *argv[])
     n0, 
     Ipv4Address("10.1.3.2"), 
     80, 
-    "IUdp",
+    "Udp",
     ConstantVariable(1), 
     ConstantVariable(0));
   // Start the application
@@ -161,7 +161,7 @@ int main (int argc, char *argv[])
     n3, 
     Ipv4Address("10.1.2.1"), 
     80, 
-    "IUdp",
+    "Udp",
     ConstantVariable(1), 
     ConstantVariable(0));
   // Start the application
diff --git a/samples/main-simple.cc b/samples/main-simple.cc
index f7c719c62..f0f4ce4dc 100644
--- a/samples/main-simple.cc
+++ b/samples/main-simple.cc
@@ -40,7 +40,7 @@ RunSimulation (void)
 {
   Ptr<Node> a = Create<InternetNode> ();
 
-  InterfaceId iid = InterfaceId::LookupByName ("IUdp");
+  InterfaceId iid = InterfaceId::LookupByName ("Udp");
   Ptr<SocketFactory> socketFactory = a->QueryInterface<SocketFactory> (iid);
 
   Ptr<Socket> sink = socketFactory->CreateSocket ();