diff --git a/fs/yaffs2/yaffs_uboot_glue.c b/fs/yaffs2/yaffs_uboot_glue.c
index e113e40..50000a1 100644
--- a/fs/yaffs2/yaffs_uboot_glue.c
+++ b/fs/yaffs2/yaffs_uboot_glue.c
@@ -20,6 +20,7 @@
  */
 
 #include <common.h>
+#include <div64.h>
 
 #include <config.h>
 #include "nand.h"
@@ -184,7 +185,7 @@
 	}
 
 	if (end_block == 0)
-		end_block = mtd->size / mtd->erasesize - 1;
+		end_block = lldiv(mtd->size, mtd->erasesize - 1);
 
 	if (end_block < start_block) {
 		printf("Bad start/end\n");
diff --git a/fs/yaffs2/yaffsfs.c b/fs/yaffs2/yaffsfs.c
index ac4a010..334598e 100644
--- a/fs/yaffs2/yaffsfs.c
+++ b/fs/yaffs2/yaffsfs.c
@@ -11,6 +11,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <div64.h>
 #include "yaffsfs.h"
 #include "yaffs_guts.h"
 #include "yaffscfg.h"
@@ -1603,8 +1604,8 @@
 		buf->st_rdev = obj->yst_rdev;
 		buf->st_size = yaffs_get_obj_length(obj);
 		buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
-		buf->st_blocks = (buf->st_size + buf->st_blksize - 1) /
-		    buf->st_blksize;
+		buf->st_blocks = lldiv(buf->st_size + buf->st_blksize - 1,
+		    buf->st_blksize);
 #if CONFIG_YAFFS_WINCE
 		buf->yst_wince_atime[0] = obj->win_atime[0];
 		buf->yst_wince_atime[1] = obj->win_atime[1];