diff --git a/qemu-img.c b/qemu-img.c
index 498fbf42fe..4548dbff82 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3210,12 +3210,9 @@ static int img_map(int argc, char **argv)
     curr.start = start_offset;
     while (curr.start + curr.length < length) {
         int64_t offset = curr.start + curr.length;
-        int64_t n;
+        int64_t n = length - offset;
 
-        /* Probe up to 1 GiB at a time.  */
-        n = MIN(1 * GiB, length - offset);
         ret = get_block_status(bs, offset, n, &next);
-
         if (ret < 0) {
             error_report("Could not read file metadata: %s", strerror(-ret));
             goto out;