diff --git a/ascii/src/lib.rs b/ascii/src/lib.rs
index e406af9..ce778e2 100644
--- a/ascii/src/lib.rs
+++ b/ascii/src/lib.rs
@@ -1,6 +1,4 @@
 mod my_ascii {
-    use std::ascii::AsciiExt; // for u8::is_ascii
-
     /// An ASCII-encoded string.
     #[derive(Debug, Eq, PartialEq)]
     pub struct Ascii(