diff --git a/src/parser/ast.rs b/src/parser/ast.rs
index da9353ec..18389225 100644
--- a/src/parser/ast.rs
+++ b/src/parser/ast.rs
@@ -10,7 +10,6 @@ use std::cell::{Cell, Ref, RefCell, RefMut};
 use std::fmt;
 use std::hash::Hash;
 use std::hash::Hasher;
-use std::i64;
 use std::io::{Error as IOError, ErrorKind};
 use std::ops::Not;
 use std::ops::RangeInclusive;