diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 36abbdafb26e31cddcd9f4a3ba9f62d445df3d24..0a5388347fca395263e99f797a3bc3b501b2f58e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2748,7 +2748,8 @@ static int ext4_writepages(struct address_space *mapping,
 		 * We may need to convert up to one extent per block in
 		 * the page and we may dirty the inode.
 		 */
-		rsv_blocks = 1 + (PAGE_SIZE >> inode->i_blkbits);
+		rsv_blocks = 1 + ext4_chunk_trans_blocks(inode,
+						PAGE_SIZE >> inode->i_blkbits);
 	}
 
 	/*