diff --git a/lib/reader/src/lexer.rs b/lib/reader/src/lexer.rs
index bad7a6369d..f6d89881fb 100644
--- a/lib/reader/src/lexer.rs
+++ b/lib/reader/src/lexer.rs
@@ -3,7 +3,7 @@
 use cretonne_codegen::ir::types;
 use cretonne_codegen::ir::{Ebb, Value};
 use error::Location;
-#[allow(unused_imports)]
+#[allow(unused_imports, deprecated)]
 use std::ascii::AsciiExt;
 use std::str::CharIndices;
 use std::u16;