diff --git a/Cargo.toml b/Cargo.toml
index fbd3d9f..cf33dc1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name = "toml"
-version = "0.1.19"
+version = "0.1.20"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
 license = "MIT/Apache-2.0"
 readme = "README.md"
diff --git a/src/lib.rs b/src/lib.rs
index 8d87562..da2ddbc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -36,7 +36,6 @@
 //! [2]: https://github.com/BurntSushi/toml-test
 
 #![doc(html_root_url = "http://alexcrichton.com/toml-rs")]
-#![feature(core)]
 #![deny(missing_docs)]
 #![cfg_attr(test, deny(warnings))]
 
diff --git a/src/parser.rs b/src/parser.rs
index 377da24..9a15de8 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -3,7 +3,6 @@ use std::char;
 use std::collections::BTreeMap;
 use std::error::Error;
 use std::fmt;
-use std::num::FromStrRadix;
 use std::str;
 
 use Table as TomlTable;
@@ -392,7 +391,7 @@ impl<'a> Parser<'a> {
                     } else {
                         "invalid"
                     };
-                    match FromStrRadix::from_str_radix(num, 16).ok() {
+                    match u32::from_str_radix(num, 16).ok() {
                         Some(n) => {
                             match char::from_u32(n) {
                                 Some(c) => {