diff --git a/libs/main/io_devices/piethernet.cpp b/libs/main/io_devices/piethernet.cpp
index 7dadc7c8..5fd3d057 100644
--- a/libs/main/io_devices/piethernet.cpp
+++ b/libs/main/io_devices/piethernet.cpp
@@ -57,6 +57,7 @@
 #    include <fcntl.h>
 #    include <sys/ioctl.h>
 #    include <netinet/in.h>
+#    include <netinet/tcp.h>
 #    include <arpa/inet.h>
 #    include <sys/socket.h>
 #    include <netdb.h>