diff --git a/src/internet/model/ipv4-end-point-demux.cc b/src/internet/model/ipv4-end-point-demux.cc
index 476583781..08591cfef 100644
--- a/src/internet/model/ipv4-end-point-demux.cc
+++ b/src/internet/model/ipv4-end-point-demux.cc
@@ -29,7 +29,7 @@ namespace ns3 {
 NS_LOG_COMPONENT_DEFINE ("Ipv4EndPointDemux");
 
 Ipv4EndPointDemux::Ipv4EndPointDemux ()
-  : m_ephemeral (49152), m_portLast (65535), m_portFirst (49152)
+  : m_ephemeral (1024), m_portLast (65535), m_portFirst (1024)
 {
   NS_LOG_FUNCTION (this);
 }
diff --git a/src/internet/model/ipv6-end-point-demux.cc b/src/internet/model/ipv6-end-point-demux.cc
index ae0eb9858..50675bdb8 100644
--- a/src/internet/model/ipv6-end-point-demux.cc
+++ b/src/internet/model/ipv6-end-point-demux.cc
@@ -27,8 +27,8 @@ namespace ns3 {
 NS_LOG_COMPONENT_DEFINE ("Ipv6EndPointDemux");
 
 Ipv6EndPointDemux::Ipv6EndPointDemux ()
-  : m_ephemeral (49152),
-    m_portFirst (49152),
+  : m_ephemeral (1024),
+    m_portFirst (1024),
     m_portLast (65535)
 {
   NS_LOG_FUNCTION (this);