diff --git a/drivers/pktmem.c b/drivers/pktmem.c
index 173b0bf..b2497b7 100644
--- a/drivers/pktmem.c
+++ b/drivers/pktmem.c
@@ -8,6 +8,7 @@
  *
  * %LICENSE%
  */
+
 #include "physmmap.h"
 #include "pktmem.h"
 #include "lwip/mem.h"
@@ -16,17 +17,17 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <arch.h>
 
 
 #define CACHE_LINE_SIZE 64
-#define PAGE_SIZE 4096
 
 #define TRUE_LRU 0
 
 
-#define PKT_BUF_SIZE (2048 - CACHE_LINE_SIZE)
-#define PKT_BUF_CNT	(size_t)((PAGE_SIZE - CACHE_LINE_SIZE) / PKT_BUF_SIZE)
-#define PKT_BUF_IDX	11	// log2(PAGE_SIZE) - ceil(log2(PKT_BUF_CNT))
+#define PKT_BUF_SIZE       (2048 - CACHE_LINE_SIZE)
+#define PKT_BUF_CNT        (size_t)((_PAGE_SIZE - CACHE_LINE_SIZE) / PKT_BUF_SIZE)
+#define PKT_BUF_IDX        11 /* log2(_PAGE_SIZE) - ceil(log2(PKT_BUF_CNT)) */
 #define PKT_BUF_CACHE_SIZE 16
 
 
@@ -65,8 +66,8 @@ static void net_listDel(buf_page_head_t *ph)
 
 static void net_freePktBuf(void *p)
 {
-	buf_page_head_t *ph = (void *)((uintptr_t)p & ~(PAGE_SIZE - 1));
-	unsigned which = ((size_t)p & (PAGE_SIZE - 1)) >> PKT_BUF_IDX;
+	buf_page_head_t *ph = (void *)((uintptr_t)p & ~(_PAGE_SIZE - 1));
+	unsigned which = ((size_t)p & (_PAGE_SIZE - 1)) >> PKT_BUF_IDX;
 	unsigned old_mask;
 
 	old_mask = ph->free_mask;
@@ -76,7 +77,7 @@ static void net_freePktBuf(void *p)
 	if (pkt_bufs_free > PKT_BUF_CACHE_SIZE && ph->free_mask == (1 << PKT_BUF_CNT) - 1) {
 		if (old_mask)
 			net_listDel(ph);
-		munmap(ph, PAGE_SIZE);
+		munmap(ph, _PAGE_SIZE);
 		pkt_bufs_free -= PKT_BUF_CNT;
 		return;
 	}
@@ -113,7 +114,7 @@ static ssize_t net_allocPktBuf(void **bufp)
 	if (!pkt_bufs_free) {
 		SYS_ARCH_UNPROTECT(old_level);
 
-		ph = dmammap(PAGE_SIZE);
+		ph = dmammap(_PAGE_SIZE);
 		if (!ph) {
 			printf("mmap: no memory?\n");
 			return 0;