diff --git a/lwip/src/include/lwipopts.h b/lwip/src/include/lwipopts.h
index 61e08e78..ba930f83 100644
--- a/lwip/src/include/lwipopts.h
+++ b/lwip/src/include/lwipopts.h
@@ -100,5 +100,6 @@
 #define TIMERS_DEBUG		LWIP_DBG_OFF
 
 #define LWIP_TCPIP_CORE_LOCKING_INPUT 1
+#define LWIP_TCPIP_CORE_LOCKING 1
 
 #endif