diff --git a/migration/block.c b/migration/block.c
index 4026b73f75..867901d2b1 100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -415,7 +415,10 @@ static int init_blk_migration(QEMUFile *f)
         }
 
         sectors = bdrv_nb_sectors(bs);
-        if (sectors <= 0) {
+        if (sectors == 0) {
+            continue;
+        }
+        if (sectors < 0) {
             ret = sectors;
             bdrv_next_cleanup(&it);
             goto out;