diff --git a/src/header/common/content_type.rs b/src/header/common/content_type.rs
index cd421c5f..cdf95620 100644
--- a/src/header/common/content_type.rs
+++ b/src/header/common/content_type.rs
@@ -1,5 +1,5 @@
 use header::{Header, HeaderFormat};
-use std::fmt::{self, Show};
+use std::fmt::{self, String};
 use header::shared::util::from_one_raw_str;
 use mime::Mime;