diff --git a/src/internet-stack/ipv4-checksum.cc b/src/internet-stack/ipv4-checksum.cc
deleted file mode 100644
index 5e93b4a7d..000000000
--- a/src/internet-stack/ipv4-checksum.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2005,2006,2007 INRIA
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation;
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
- */
-#include "ipv4-checksum.h"
-
-namespace ns3 {
-
-uint16_t 
-Ipv4ChecksumCalculate (uint16_t checksum, uint8_t *buffer, uint16_t size)
-{
-  /* see RFC 1071 to understand this code. */
-  uint32_t sum = checksum;
-  uint16_t *data = (uint16_t *) buffer;
-  for (uint16_t i = 0; i < (size/2); i++) {
-    sum += data[i];
-  }
-  if ((size % 2) != 0) {
-    uint8_t tmpBuf[2];
-    tmpBuf[0] = buffer[size-1];
-    tmpBuf[1] = 0;
-    data = (uint16_t *)tmpBuf;
-    sum += *data;
-  }
-  while (sum >> 16) {
-    sum = (sum & 0xffff) + (sum >> 16);
-  }
-  return sum;
-}
-
-uint16_t 
-Ipv4ChecksumComplete (uint16_t checksum)
-{
-  return ~checksum;
-}
-
-}; //namespace ns3
diff --git a/src/internet-stack/ipv4-checksum.h b/src/internet-stack/ipv4-checksum.h
deleted file mode 100644
index 98bbed5c2..000000000
--- a/src/internet-stack/ipv4-checksum.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2005,2006,2007 INRIA
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation;
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
- */
-#ifndef IPV4_CHECKSUM_H
-#define IPV4_CHECKSUM_H
-
-#include <stdint.h>
-
-namespace ns3 {
-
-uint16_t Ipv4ChecksumCalculate (uint16_t checksum, uint8_t *buffer, uint16_t size);
-
-uint16_t Ipv4ChecksumComplete (uint16_t checksum);
-
-}; //namespace ns3
-
-#endif /* IPV4_CHECKSUM_H */
diff --git a/src/internet-stack/wscript b/src/internet-stack/wscript
index 6e97c09d4..9d4ea3118 100644
--- a/src/internet-stack/wscript
+++ b/src/internet-stack/wscript
@@ -78,7 +78,6 @@ def build(bld):
         'ipv4-l4-protocol.cc',
         'udp-header.cc',
         'tcp-header.cc',
-        'ipv4-checksum.cc',
         'ipv4-interface.cc',
         'ipv4-l3-protocol.cc',
         'ipv4-end-point.cc',