diff --git a/contrib/ports/freertos/sys_arch.c b/contrib/ports/freertos/sys_arch.c
index 68a427fe..85683538 100644
--- a/contrib/ports/freertos/sys_arch.c
+++ b/contrib/ports/freertos/sys_arch.c
@@ -36,6 +36,7 @@
 #include "lwip/sys.h"
 #include "lwip/mem.h"
 #include "lwip/stats.h"
+#include "lwip/tcpip.h"
 #include "FreeRTOS.h"
 #include "semphr.h"
 #include "task.h"