diff --git a/README.md b/README.md
index c67121f..b16a57b 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ For more examples take a look at [tests](/tests)
 
 All features are enabled by default. To enable only specific formats, import nanoserde using 
 ```toml
-nanoserde = { version = "*", default-features = false, features = [] }
+nanoserde = { version = "*", default-features = false, features = ["std", "{format feature name}"] }
 ```
 in your `Cargo.toml` and add one or more of the following crate features:
 
diff --git a/src/lib.rs b/src/lib.rs
index 98c2778..501e803 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -16,6 +16,7 @@
 //! For `#[nserde(..)]` supported attributes for each format check [Features support matrix](https://github.com/not-fl3/nanoserde#features-support-matrix)
 
 #![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), feature(error_in_core))]
 
 extern crate alloc;
 
diff --git a/src/serde_bin.rs b/src/serde_bin.rs
index c99e858..b0af507 100644
--- a/src/serde_bin.rs
+++ b/src/serde_bin.rs
@@ -1,5 +1,11 @@
 use core::convert::TryInto;
 
+// remove this after 1.81 is live
+#[cfg(not(feature = "std"))]
+use core::error::Error;
+#[cfg(feature = "std")]
+use std::error::Error;
+
 use alloc::borrow::ToOwned;
 use alloc::boxed::Box;
 use alloc::collections::{BTreeMap, BTreeSet, LinkedList};
@@ -77,7 +83,7 @@ impl core::fmt::Display for DeBinErr {
     }
 }
 
-impl core::error::Error for DeBinErr {}
+impl Error for DeBinErr {}
 
 macro_rules! impl_ser_de_bin_for {
     ($ty:ident) => {
diff --git a/src/serde_json.rs b/src/serde_json.rs
index a10c63e..aba1dab 100644
--- a/src/serde_json.rs
+++ b/src/serde_json.rs
@@ -1,5 +1,11 @@
 use core::str::Chars;
 
+// remove this after 1.81 is live
+#[cfg(not(feature = "std"))]
+use core::error::Error;
+#[cfg(feature = "std")]
+use std::error::Error;
+
 use alloc::boxed::Box;
 use alloc::collections::{BTreeMap, BTreeSet, LinkedList};
 use alloc::format;
@@ -160,7 +166,7 @@ impl core::fmt::Display for DeJsonErr {
     }
 }
 
-impl core::error::Error for DeJsonErr {}
+impl Error for DeJsonErr {}
 
 impl DeJsonState {
     pub fn next(&mut self, i: &mut Chars) {
diff --git a/src/serde_ron.rs b/src/serde_ron.rs
index f9b8677..2a4bbde 100644
--- a/src/serde_ron.rs
+++ b/src/serde_ron.rs
@@ -1,5 +1,11 @@
 use core::str::Chars;
 
+// remove this after 1.81 is live
+#[cfg(not(feature = "std"))]
+use core::error::Error;
+#[cfg(feature = "std")]
+use std::error::Error;
+
 use alloc::boxed::Box;
 use alloc::collections::{BTreeMap, BTreeSet, LinkedList};
 use alloc::format;
@@ -157,7 +163,7 @@ impl core::fmt::Display for DeRonErr {
     }
 }
 
-impl core::error::Error for DeRonErr {}
+impl Error for DeRonErr {}
 
 impl DeRonState {
     pub fn next(&mut self, i: &mut Chars) {
diff --git a/src/toml.rs b/src/toml.rs
index 7d1fad6..1bd09ac 100644
--- a/src/toml.rs
+++ b/src/toml.rs
@@ -1,5 +1,11 @@
 use core::str::Chars;
 
+// remove this after 1.81 is live
+#[cfg(not(feature = "std"))]
+use core::error::Error;
+#[cfg(feature = "std")]
+use std::error::Error;
+
 use alloc::format;
 use alloc::string::{String, ToString};
 use alloc::{collections::BTreeMap, vec, vec::Vec};
@@ -249,7 +255,7 @@ impl Out {
     }
 }
 
-impl core::error::Error for TomlErr {}
+impl Error for TomlErr {}
 
 impl TomlParser {
     /// Parse a TOML string.