diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index 2816e61afe..cb03e0f2d3 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -74,21 +74,25 @@ static int64_t cor_getlength(BlockDriverState *bs)
 }
 
 
-static int coroutine_fn cor_co_preadv(BlockDriverState *bs,
-                                      uint64_t offset, uint64_t bytes,
-                                      QEMUIOVector *qiov, int flags)
+static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
+                                           uint64_t offset, uint64_t bytes,
+                                           QEMUIOVector *qiov,
+                                           size_t qiov_offset,
+                                           int flags)
 {
-    return bdrv_co_preadv(bs->file, offset, bytes, qiov,
-                          flags | BDRV_REQ_COPY_ON_READ);
+    return bdrv_co_preadv_part(bs->file, offset, bytes, qiov, qiov_offset,
+                               flags | BDRV_REQ_COPY_ON_READ);
 }
 
 
-static int coroutine_fn cor_co_pwritev(BlockDriverState *bs,
-                                       uint64_t offset, uint64_t bytes,
-                                       QEMUIOVector *qiov, int flags)
+static int coroutine_fn cor_co_pwritev_part(BlockDriverState *bs,
+                                            uint64_t offset,
+                                            uint64_t bytes,
+                                            QEMUIOVector *qiov,
+                                            size_t qiov_offset, int flags)
 {
-
-    return bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
+    return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,
+                                flags);
 }
 
 
@@ -137,8 +141,8 @@ static BlockDriver bdrv_copy_on_read = {
 
     .bdrv_getlength                     = cor_getlength,
 
-    .bdrv_co_preadv                     = cor_co_preadv,
-    .bdrv_co_pwritev                    = cor_co_pwritev,
+    .bdrv_co_preadv_part                = cor_co_preadv_part,
+    .bdrv_co_pwritev_part               = cor_co_pwritev_part,
     .bdrv_co_pwrite_zeroes              = cor_co_pwrite_zeroes,
     .bdrv_co_pdiscard                   = cor_co_pdiscard,
     .bdrv_co_pwritev_compressed         = cor_co_pwritev_compressed,