diff --git a/src/ntfs-3g.c b/src/ntfs-3g.c
index 8785bae0..74c79447 100644
--- a/src/ntfs-3g.c
+++ b/src/ntfs-3g.c
@@ -752,7 +752,7 @@ static int ntfs_fuse_read(const char *org_path, char *buf, size_t size,
 		size = na->data_size - offset;
 	}
 	while (size > 0) {
-		s64 ret = ntfs_attr_pread(na, offset, size, buf);
+		s64 ret = ntfs_attr_pread(na, offset, size, buf + total);
 		if (ret != (s64)size)
 			ntfs_log_perror("ntfs_attr_pread error reading '%s' at "
 				"offset %lld: %lld <> %lld", org_path, 
@@ -804,7 +804,7 @@ static int ntfs_fuse_write(const char *org_path, const char *buf, size_t size,
 		goto exit;
 	}
 	while (size) {
-		s64 ret = ntfs_attr_pwrite(na, offset, size, buf);
+		s64 ret = ntfs_attr_pwrite(na, offset, size, buf + total);
 		if (0 <= ret && ret < (s64)size)
 			ntfs_log_perror("ntfs_attr_pwrite partial write to '%s'"
 				" (%lld: %lld <> %lld)", path, (long long)offset,