diff --git a/primitive-types/src/error.rs b/primitive-types/src/error.rs
deleted file mode 100644
index 298fc14ed..000000000
--- a/primitive-types/src/error.rs
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright 2015-2019 Parity Technologies
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// TODO: Remove TryFrom and TryInto when Rust trait is stablized
-// https://github.com/paritytech/parity-common/issues/103
-//! Error, `TryFrom` and `TryInto` trait, should be removed when standard library stablize those.
-
-/// Error type for conversion.
-pub enum Error {
-	/// Overflow encountered.
-	Overflow,
-}
-
-/// An attempted conversion that consumes `self`, which may or may not be
-/// expensive.
-///
-/// Library authors should not directly implement this trait, but should prefer
-/// implementing the [`TryFrom`] trait, which offers greater flexibility and
-/// provides an equivalent `TryInto` implementation for free, thanks to a
-/// blanket implementation in the standard library. For more information on this,
-/// see the documentation for [`Into`].
-///
-/// [`TryFrom`]: trait.TryFrom.html
-/// [`Into`]: trait.Into.html
-pub trait TryInto<T>: Sized {
-    /// The type returned in the event of a conversion error.
-    type Error;
-
-    /// Performs the conversion.
-    fn try_into(self) -> Result<T, Self::Error>;
-}
-
-/// Attempt to construct `Self` via a conversion.
-pub trait TryFrom<T>: Sized {
-    /// The type returned in the event of a conversion error.
-    type Error;
-
-    /// Performs the conversion.
-    fn try_from(value: T) -> Result<Self, Self::Error>;
-}
-
-// TryFrom implies TryInto
-impl<T, U> TryInto<U> for T where U: TryFrom<T>
-{
-    type Error = U::Error;
-
-    fn try_into(self) -> Result<U, U::Error> {
-        U::try_from(self)
-    }
-}
-
-pub enum Never { }
-
-// Infallible conversions are semantically equivalent to fallible conversions
-// with an uninhabited error type.
-impl<T, U> TryFrom<U> for T where T: From<U> {
-    type Error = Never;
-
-    fn try_from(value: U) -> Result<Self, Self::Error> {
-        Ok(T::from(value))
-    }
-}
diff --git a/primitive-types/src/lib.rs b/primitive-types/src/lib.rs
index 93e1061b0..d0e2e3cef 100644
--- a/primitive-types/src/lib.rs
+++ b/primitive-types/src/lib.rs
@@ -14,9 +14,8 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
-mod error;
-
-pub use error::{Error, TryFrom, TryInto, Never};
+#[cfg(feature = "std")]
+extern crate core;
 
 #[macro_use]
 extern crate uint;
@@ -36,6 +35,14 @@ extern crate impl_codec;
 #[macro_use]
 extern crate impl_rlp;
 
+use core::convert::TryFrom;
+
+/// Error type for conversion.
+pub enum Error {
+	/// Overflow encountered.
+	Overflow,
+}
+
 construct_uint! {
 	/// 128-bit unsigned integer.
 	pub struct U128(2);