diff --git a/src/node/capability.cc b/src/node/capability.cc
index d134feee2..5f026832d 100644
--- a/src/node/capability.cc
+++ b/src/node/capability.cc
@@ -25,12 +25,10 @@
 #include "node.h"
 #include "node-reference.h"
 
-#define nil 0
-
 namespace ns3 {
   
 Capability::Capability()
-  : m_node(nil)
+  : m_node(0)
 { // Nothing else needed
 }
 
@@ -74,7 +72,7 @@ void Capability::SetNode(Node& n)
 
 Node* Capability::GetNode() const
 {
-  if (!m_node) return nil;
+  if (!m_node) return 0;
   return m_node->GetNode();
 }
 
diff --git a/src/node/capability.h b/src/node/capability.h
index b60e0b227..d0f25aaee 100644
--- a/src/node/capability.h
+++ b/src/node/capability.h
@@ -30,8 +30,6 @@
 // The node pointer is not owned by the capability, and is not deleted
 // by the capability destructor.
 
-#define nil 0
-
 namespace ns3 {
 class Node;
 class NodeReference;
diff --git a/src/node/onoff-application.h b/src/node/onoff-application.h
index 46a5bc534..e7ea44f3e 100644
--- a/src/node/onoff-application.h
+++ b/src/node/onoff-application.h
@@ -30,8 +30,6 @@
 #include "application.h"
 #include "ns3/event-id.h"
 
-#define nil 0
-
 namespace ns3 {
 
 class Ipv4Address;