From 324dfc1a91900e2e6417182db345784092b57ecc Mon Sep 17 00:00:00 2001
From: Stephen Chung <schungx@live.com>
Date: Thu, 7 Sep 2023 13:10:43 +0800
Subject: [PATCH] Fix no-std build.

---
 src/types/custom_types.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/types/custom_types.rs b/src/types/custom_types.rs
index 2834f4764..403d70879 100644
--- a/src/types/custom_types.rs
+++ b/src/types/custom_types.rs
@@ -1,6 +1,8 @@
 //! Collection of custom types.
 
 use crate::Identifier;
+#[cfg(feature = "no_std")]
+use std::prelude::v1::*;
 use std::{any::type_name, collections::BTreeMap};
 
 /// _(internals)_ Information for a custom type.