diff --git a/blockdev.c b/blockdev.c
index 25aaacf253..93417f6302 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2829,7 +2829,7 @@ static BlockJob *do_backup_common(BackupCommon *backup,
 {
     BlockJob *job = NULL;
     BdrvDirtyBitmap *bmap = NULL;
-    BackupPerf perf = { .use_copy_range = true, .max_workers = 64 };
+    BackupPerf perf = { .max_workers = 64 };
     int job_flags = JOB_DEFAULT;
 
     if (!backup->has_speed) {
diff --git a/qapi/block-core.json b/qapi/block-core.json
index abcd41ed63..9f555d5c1d 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1377,7 +1377,7 @@
 # Optional parameters for backup. These parameters don't affect
 # functionality, but may significantly affect performance.
 #
-# @use-copy-range: Use copy offloading. Default true.
+# @use-copy-range: Use copy offloading. Default false.
 #
 # @max-workers: Maximum number of parallel requests for the sustained background
 #               copying process. Doesn't influence copy-before-write operations.