diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index c428682..d34add4 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -128,10 +128,10 @@
 
 
 static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
-                                           uint64_t offset, uint64_t bytes,
+                                           int64_t offset, int64_t bytes,
                                            QEMUIOVector *qiov,
                                            size_t qiov_offset,
-                                           int flags)
+                                           BdrvRequestFlags flags)
 {
     int64_t n;
     int local_flags;