diff --git a/src/include/lwip/priv/memp_std.h b/src/include/lwip/priv/memp_std.h
index 7ca03128..1223b123 100644
--- a/src/include/lwip/priv/memp_std.h
+++ b/src/include/lwip/priv/memp_std.h
@@ -28,7 +28,7 @@
 #ifndef LWIP_PBUF_MEMPOOL
 /* This treats "pbuf pools" just like any other pool.
  * Allocates buffers for a pbuf struct AND a payload size */
-#define LWIP_PBUF_MEMPOOL(name, num, payload, desc) LWIP_MEMPOOL(name, num, (MEMP_ALIGN_SIZE(sizeof(struct pbuf)) + MEMP_ALIGN_SIZE(payload)), desc)
+#define LWIP_PBUF_MEMPOOL(name, num, payload, desc) LWIP_MEMPOOL(name, num, (LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf)) + LWIP_MEM_ALIGN_SIZE(payload)), desc)
 #endif /* LWIP_PBUF_MEMPOOL */