diff --git a/hmp.c b/hmp.c
index b5e3f54534..02103dfb75 100644
--- a/hmp.c
+++ b/hmp.c
@@ -318,6 +318,7 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict)
         monitor_printf(mon, " %s: %" PRId64 " milliseconds",
             MigrationParameter_lookup[MIGRATION_PARAMETER_DOWNTIME_LIMIT],
             params->downtime_limit);
+        assert(params->has_x_checkpoint_delay);
         monitor_printf(mon, " %s: %" PRId64,
             MigrationParameter_lookup[MIGRATION_PARAMETER_X_CHECKPOINT_DELAY],
             params->x_checkpoint_delay);
diff --git a/migration/migration.c b/migration/migration.c
index e331f28382..f498ab84f2 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -593,6 +593,7 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp)
     params->max_bandwidth = s->parameters.max_bandwidth;
     params->has_downtime_limit = true;
     params->downtime_limit = s->parameters.downtime_limit;
+    params->has_x_checkpoint_delay = true;
     params->x_checkpoint_delay = s->parameters.x_checkpoint_delay;
 
     return params;