diff --git a/nac3core/src/typecheck/typedef/mod.rs b/nac3core/src/typecheck/typedef/mod.rs
index 05b2336b..66f66354 100644
--- a/nac3core/src/typecheck/typedef/mod.rs
+++ b/nac3core/src/typecheck/typedef/mod.rs
@@ -1,5 +1,5 @@
 use itertools::{chain, zip, Itertools};
-use std::borrow::{Borrow, Cow};
+use std::borrow::Cow;
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::iter::once;