diff --git a/src/header/mod.rs b/src/header/mod.rs
index ee80fc7..2b85821 100644
--- a/src/header/mod.rs
+++ b/src/header/mod.rs
@@ -79,8 +79,10 @@ pub use self::map::{
     AsHeaderName,
     IntoHeaderName,
     Iter,
+    IterMut,
     Keys,
     Values,
+    ValuesMut,
     Drain,
     GetAll,
     Entry,