diff --git a/src/internet-node/ipv4-l4-protocol.h b/src/internet-node/ipv4-l4-protocol.h
index 8e1b4397e..f23aa510b 100644
--- a/src/internet-node/ipv4-l4-protocol.h
+++ b/src/internet-node/ipv4-l4-protocol.h
@@ -29,7 +29,6 @@
 
 namespace ns3 {
 
-class Node;
 class Packet;
 class Ipv4Address;
 class TraceResolver;