diff --git a/migration/savevm.c b/migration/savevm.c
index 211eff3a8b..a9181b444b 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -536,6 +536,9 @@ static void dump_vmstate_vmsf(FILE *out_file, const VMStateField *field,
             field->version_id);
     fprintf(out_file, "%*s\"field_exists\": %s,\n", indent, "",
             field->field_exists ? "true" : "false");
+    if (field->flags & VMS_ARRAY) {
+        fprintf(out_file, "%*s\"num\": %d,\n", indent, "", field->num);
+    }
     fprintf(out_file, "%*s\"size\": %zu", indent, "", field->size);
     if (field->vmsd != NULL) {
         fprintf(out_file, ",\n");