diff --git a/block-migration.c b/block-migration.c
index bcd00390257a0d2d6179f34f987644b34597c1ad..43ab2028c0bb544f422c11677e729897e6500256 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -539,6 +539,7 @@ static int block_save_setup(QEMUFile *f, void *opaque)
 static int block_save_iterate(QEMUFile *f, void *opaque)
 {
     int ret;
+    int64_t last_ftell = qemu_ftell(f);
 
     DPRINTF("Enter save live iterate submitted %d transferred %d\n",
             block_mig_state.submitted, block_mig_state.transferred);
@@ -582,12 +583,7 @@ static int block_save_iterate(QEMUFile *f, void *opaque)
 
     qemu_put_be64(f, BLK_MIG_FLAG_EOS);
 
-    /* Complete when bulk transfer is done and all dirty blocks have been
-     * transferred.
-     */
-    return block_mig_state.bulk_completed &&
-           block_mig_state.submitted == 0 &&
-           block_mig_state.read_done == 0;
+    return qemu_ftell(f) - last_ftell;
 }
 
 static int block_save_complete(QEMUFile *f, void *opaque)
@@ -629,10 +625,18 @@ static int block_save_complete(QEMUFile *f, void *opaque)
 
 static uint64_t block_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 {
+    /* Estimate pending number of bytes to send */
+    uint64_t pending = get_remaining_dirty() +
+                       block_mig_state.submitted * BLOCK_SIZE +
+                       block_mig_state.read_done * BLOCK_SIZE;
+
+    /* Report at least one block pending during bulk phase */
+    if (pending == 0 && !block_mig_state.bulk_completed) {
+        pending = BLOCK_SIZE;
+    }
 
-    DPRINTF("Enter save live pending  %ld\n", get_remaining_dirty());
-
-    return get_remaining_dirty();
+    DPRINTF("Enter save live pending  %" PRIu64 "\n", pending);
+    return pending;
 }
 
 static int block_load(QEMUFile *f, void *opaque, int version_id)