diff -r 4ddcca845f07 src/internet-stack/tcp-l4-protocol.cc
--- a/src/internet-stack/tcp-l4-protocol.cc	Fri Nov 28 17:42:10 2008 +0100
+++ b/src/internet-stack/tcp-l4-protocol.cc	Mon Dec 01 11:44:12 2008 -0500
@@ -139,7 +139,7 @@ TcpStateMachine::TcpStateMachine()
   aT[CLOSE_WAIT][SEQ_RECV]    = SA (CLOSE_WAIT, NEW_SEQ_RX);
   aT[CLOSE_WAIT][APP_CLOSE]   = SA (LAST_ACK,   FIN_ACK_TX);
   aT[CLOSE_WAIT][TIMEOUT]     = SA (CLOSE_WAIT, NO_ACT);
-  aT[CLOSE_WAIT][ACK_RX]      = SA (CLOSE_WAIT, NO_ACT);
+  aT[CLOSE_WAIT][ACK_RX]      = SA (CLOSE_WAIT, NEW_ACK);
   aT[CLOSE_WAIT][SYN_RX]      = SA (CLOSED,     RST_TX);
   aT[CLOSE_WAIT][SYN_ACK_RX]  = SA (CLOSED,     RST_TX);
   aT[CLOSE_WAIT][FIN_RX]      = SA (CLOSE_WAIT, ACK_TX);