diff --git a/src/parser.rs b/src/parser.rs
index d21b304..7b910d3 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -305,7 +305,7 @@ impl<'a> Parser<'a> {
                 }
                 Some((_, '\n')) |
                 Some((_, '\r')) if multiline => ret.push('\n'),
-                Some((pos, ch)) if ch < '\u001f' => {
+                Some((pos, ch)) if ch < '\u{1f}' => {
                     let mut escaped = String::new();
                     for c in ch.escape_default() {
                         escaped.push(c);
@@ -333,14 +333,14 @@ impl<'a> Parser<'a> {
 
         fn escape(me: &mut Parser, pos: uint, multiline: bool) -> Option<char> {
             match me.cur.next() {
-                Some((_, 'b')) => Some('\u0008'),
-                Some((_, 't')) => Some('\u0009'),
-                Some((_, 'n')) => Some('\u000a'),
-                Some((_, 'f')) => Some('\u000c'),
-                Some((_, 'r')) => Some('\u000d'),
-                Some((_, '"')) => Some('\u0022'),
-                Some((_, '/')) => Some('\u002f'),
-                Some((_, '\\')) => Some('\u005c'),
+                Some((_, 'b')) => Some('\u{8}'),
+                Some((_, 't')) => Some('\u{9}'),
+                Some((_, 'n')) => Some('\u{a}'),
+                Some((_, 'f')) => Some('\u{c}'),
+                Some((_, 'r')) => Some('\u{d}'),
+                Some((_, '"')) => Some('\u{22}'),
+                Some((_, '/')) => Some('\u{2f}'),
+                Some((_, '\\')) => Some('\u{5c}'),
                 Some((pos, c @ 'u')) |
                 Some((pos, c @ 'U')) => {
                     let len = if c == 'u' {4} else {8};
diff --git a/src/show.rs b/src/show.rs
index 32485da..330b7e5 100644
--- a/src/show.rs
+++ b/src/show.rs
@@ -15,13 +15,13 @@ impl fmt::Show for Value {
                 try!(write!(f, "\""));
                 for ch in s.as_slice().chars() {
                     match ch {
-                        '\u0008' => try!(write!(f, "\\b")),
-                        '\u0009' => try!(write!(f, "\\t")),
-                        '\u000a' => try!(write!(f, "\\n")),
-                        '\u000c' => try!(write!(f, "\\f")),
-                        '\u000d' => try!(write!(f, "\\r")),
-                        '\u0022' => try!(write!(f, "\\\"")),
-                        '\u005c' => try!(write!(f, "\\\\")),
+                        '\u{8}' => try!(write!(f, "\\b")),
+                        '\u{9}' => try!(write!(f, "\\t")),
+                        '\u{a}' => try!(write!(f, "\\n")),
+                        '\u{c}' => try!(write!(f, "\\f")),
+                        '\u{d}' => try!(write!(f, "\\r")),
+                        '\u{22}' => try!(write!(f, "\\\"")),
+                        '\u{5c}' => try!(write!(f, "\\\\")),
                         ch => try!(write!(f, "{}", ch)),
                     }
                 }