diff --git a/block/nbd-client.c b/block/nbd-client.c
index 4d13444409c4e5c76727d51f7f6824c5a4c64070..420bce89f3ffd6d4858813debc9df1dd24695011 100644
--- a/block/nbd-client.c
+++ b/block/nbd-client.c
@@ -269,10 +269,6 @@ static int nbd_co_writev_1(BlockDriverState *bs, int64_t sector_num,
     return -reply.error;
 }
 
-/* qemu-nbd has a limit of slightly less than 1M per request.  Try to
- * remain aligned to 4K. */
-#define NBD_MAX_SECTORS 2040
-
 int nbd_client_co_readv(BlockDriverState *bs, int64_t sector_num,
                         int nb_sectors, QEMUIOVector *qiov)
 {
diff --git a/include/block/nbd.h b/include/block/nbd.h
index df1f8043386570d8d8878c456c8fae937b500ba2..eeda3ebdf7b7780599f6ff89eb6a8fd31ac289ce 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -77,6 +77,8 @@ enum {
 
 /* Maximum size of a single READ/WRITE data buffer */
 #define NBD_MAX_BUFFER_SIZE (32 * 1024 * 1024)
+#define NBD_MAX_SECTORS (NBD_MAX_BUFFER_SIZE / BDRV_SECTOR_SIZE)
+
 /* Maximum size of an export name. The NBD spec requires 256 and
  * suggests that servers support up to 4096, but we stick to only the
  * required size so that we can stack-allocate the names, and because