diff --git a/src/include/lwip/opt.h b/src/include/lwip/opt.h
index 6ee4229a..f71fa7ad 100644
--- a/src/include/lwip/opt.h
+++ b/src/include/lwip/opt.h
@@ -263,6 +263,13 @@
 #define MEMP_NUM_TCPIP_MSG_INPKT        8
 #endif
 
+/**
+ * MEMP_NUM_TCPIP_MSG is deprecated
+ */
+#ifdef MEMP_NUM_TCPIP_MSG
+#error MEMP_NUM_TCPIP_MSG option is deprecated. Remove it from your lwipopts.h.
+#endif
+
 /**
  * PBUF_POOL_SIZE: the number of buffers in the pbuf pool. 
  */
@@ -1439,4 +1446,3 @@
 #endif
 
 #endif /* __LWIP_OPT_H__ */
-