diff -r 4db6a4741ec7 src/internet/model/tcp-socket-base.cc
--- a/src/internet/model/tcp-socket-base.cc	Tue Feb 03 16:27:01 2015 -0800
+++ b/src/internet/model/tcp-socket-base.cc	Tue Jun 02 11:15:02 2015 -0300
@@ -1716,6 +1716,7 @@
 
   bool hasSyn = flags & TcpHeader::SYN;
   bool hasFin = flags & TcpHeader::FIN;
+  bool hasAck = flags & TcpHeader::ACK;
   bool isAck = flags == TcpHeader::ACK;
   if (hasSyn)
     {
@@ -1723,6 +1724,8 @@
         { // No more connection retries, give up
           NS_LOG_LOGIC ("Connection failed.");
           m_rtt->Reset (); //According to recommendation -> RFC 6298
+          if (hasAck)
+            m_closeNotified = true; 
           CloseAndNotify ();
           return;
         }