diff --git a/src/core/examples/main-callback.cc b/src/core/examples/main-callback.cc
index d7ca6dade..fa8faa35b 100644
--- a/src/core/examples/main-callback.cc
+++ b/src/core/examples/main-callback.cc
@@ -19,6 +19,7 @@
 
 #include "ns3/callback.h"
 #include "ns3/assert.h"
+#include "ns3/command-line.h"
 #include <iostream>
 
 /**
@@ -68,6 +69,9 @@ public:
 
 int main (int argc, char *argv[])
 {
+  CommandLine cmd;
+  cmd.Parse(argc, argv);
+  
   // return type: double
   // first arg type: double
   // second arg type: double
diff --git a/src/core/examples/main-ptr.cc b/src/core/examples/main-ptr.cc
index 14e3030ca..5e02be4c9 100644
--- a/src/core/examples/main-ptr.cc
+++ b/src/core/examples/main-ptr.cc
@@ -19,6 +19,7 @@
 
 #include "ns3/ptr.h"
 #include "ns3/object.h"
+#include "ns3/command-line.h"
 #include <iostream>
 
 /**
@@ -92,6 +93,9 @@ ClearPtr (void)
 
 int main (int argc, char *argv[])
 {
+  CommandLine cmd;
+  cmd.Parse(argc, argv);
+  
   {
     // Create a new object of type PtrExample, store it in global 
     // variable g_ptr
diff --git a/src/core/examples/main-random-variable-stream.cc b/src/core/examples/main-random-variable-stream.cc
index 67691a46b..47c947f1a 100644
--- a/src/core/examples/main-random-variable-stream.cc
+++ b/src/core/examples/main-random-variable-stream.cc
@@ -23,6 +23,7 @@
 #include "ns3/string.h"
 #include "ns3/integer.h"
 #include "ns3/gnuplot.h"
+#include "ns3/command-line.h"
 #include <map>
 #include <cmath>
 
@@ -102,6 +103,9 @@ Histogram (Ptr<RandomVariableStream> rndvar,
 
 int main (int argc, char *argv[])
 {
+  CommandLine cmd;
+  cmd.Parse(argc, argv);
+  
   unsigned int probes = 1000000;
   double precision = 0.01;
 
diff --git a/src/core/examples/main-random-variable.cc b/src/core/examples/main-random-variable.cc
index 3290ee554..56650dd52 100644
--- a/src/core/examples/main-random-variable.cc
+++ b/src/core/examples/main-random-variable.cc
@@ -23,6 +23,7 @@
 #include "ns3/string.h"
 #include "ns3/integer.h"
 #include "ns3/gnuplot.h"
+#include "ns3/command-line.h"
 #include <map>
 #include <cmath>
 
@@ -102,6 +103,9 @@ Histogram (Ptr<RandomVariableStream> rndvar,
 
 int main (int argc, char *argv[])
 {
+  CommandLine cmd;
+  cmd.Parse(argc, argv);
+  
   unsigned int probes = 1000000;
   double precision = 0.01;