diff --git a/src/repart/repart.c b/src/repart/repart.c
index e91e6253ffd..257e6b7222b 100644
--- a/src/repart/repart.c
+++ b/src/repart/repart.c
@@ -6642,14 +6642,10 @@ static int context_copy_blocks(Context *context) {
                 if (p->copy_blocks_offset == UINT64_MAX)
                         log_info("Copying in '%s' (%s) on block level into future partition %" PRIu64 ".",
                                  p->copy_blocks_path, FORMAT_BYTES(p->copy_blocks_size), p->partno);
-                else {
+                else
                         log_info("Copying in '%s' @ %" PRIu64 " (%s) on block level into future partition %" PRIu64 ".",
                                  p->copy_blocks_path, p->copy_blocks_offset, FORMAT_BYTES(p->copy_blocks_size), p->partno);
 
-                        if (lseek(p->copy_blocks_fd, p->copy_blocks_offset, SEEK_SET) < 0)
-                                return log_error_errno(errno, "Failed to seek to copy blocks offset in %s: %m", p->copy_blocks_path);
-                }
-
                 /* We call copy_bytes_full() instead of copy_file_range() directly, because copy_file_range()
                  * needs to be called with a size limit to allow for progress updates. But we don't want that
                  * for cloning, we want one big massive reflink if possible, and unfortunately we can't know
@@ -6658,7 +6654,7 @@ static int context_copy_blocks(Context *context) {
                  * clone, and then falls back to copying in chunks. */
                 r = copy_bytes_full(
                                 p->copy_blocks_fd,
-                                /* foffset= */ NULL,
+                                /* foffset= */ p->copy_blocks_offset == UINT64_MAX ? NULL : &(uint64_t) { p->copy_blocks_offset },
                                 partition_target_fd(t),
                                 /* toffset= */ NULL,
                                 p->copy_blocks_size,