diff --git a/components/net/lwip/src/lwipopts.h b/components/net/lwip/src/lwipopts.h
index 0f07cc3385..96f6d37f5e 100644
--- a/components/net/lwip/src/lwipopts.h
+++ b/components/net/lwip/src/lwipopts.h
@@ -139,7 +139,9 @@
 #endif
 
 /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
-#define PBUF_POOL_BUFSIZE           1500
+#ifdef RT_LWIP_PBUF_POOL_BUFSIZE
+#define PBUF_POOL_BUFSIZE			 RT_LWIP_PBUF_POOL_BUFSIZE
+#endif
 
 /* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
    link level header. */