diff --git a/src/internet/model/tcp-socket-base.cc b/src/internet/model/tcp-socket-base.cc
index 4d1f3a264..52d493450 100644
--- a/src/internet/model/tcp-socket-base.cc
+++ b/src/internet/model/tcp-socket-base.cc
@@ -260,6 +260,7 @@ TcpSocketBase::TcpSocketBase (void)
     m_rWnd (0),
     m_highRxMark (0),
     m_highRxAckMark (0),
+    m_bytesAckedNotProcessed (0),
     m_sndScaleFactor (0),
     m_rcvScaleFactor (0),
     m_timestampEnabled (true),
@@ -319,6 +320,7 @@ TcpSocketBase::TcpSocketBase (const TcpSocketBase& sock)
     m_rWnd (sock.m_rWnd),
     m_highRxMark (sock.m_highRxMark),
     m_highRxAckMark (sock.m_highRxAckMark),
+    m_bytesAckedNotProcessed (sock.m_bytesAckedNotProcessed),
     m_winScalingEnabled (sock.m_winScalingEnabled),
     m_sndScaleFactor (sock.m_sndScaleFactor),
     m_rcvScaleFactor (sock.m_rcvScaleFactor),