diff --git a/src/internet-stack/nsc-tcp-socket-impl.cc b/src/internet-stack/nsc-tcp-socket-impl.cc
index 14df13916..e2d627274 100644
--- a/src/internet-stack/nsc-tcp-socket-impl.cc
+++ b/src/internet-stack/nsc-tcp-socket-impl.cc
@@ -22,7 +22,6 @@
 #include "ns3/log.h"
 #include "ns3/ipv4.h"
 #include "ipv4-end-point.h"
-#include "ipv4-l4-demux.h"
 #include "nsc-tcp-l4-protocol.h"
 #include "nsc-tcp-socket-impl.h"
 #include "ns3/simulation-singleton.h"