diff --git a/migration/ram.c b/migration/ram.c
index 9d1817ab7b..79d881f735 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -3506,12 +3506,13 @@ static void ram_state_pending_estimate(void *opaque, uint64_t *must_precopy,
 static void ram_state_pending_exact(void *opaque, uint64_t *must_precopy,
                                     uint64_t *can_postcopy)
 {
+    MigrationState *s = migrate_get_current();
     RAMState **temp = opaque;
     RAMState *rs = *temp;
 
     uint64_t remaining_size = rs->migration_dirty_pages * TARGET_PAGE_SIZE;
 
-    if (!migration_in_postcopy()) {
+    if (!migration_in_postcopy() && remaining_size < s->threshold_size) {
         qemu_mutex_lock_iothread();
         WITH_RCU_READ_LOCK_GUARD() {
             migration_bitmap_sync_precopy(rs);