diff --git a/crates/irtt-proto/src/hmac.rs b/crates/irtt-proto/src/hmac.rs
index f650b29..95f5626 100644
--- a/crates/irtt-proto/src/hmac.rs
+++ b/crates/irtt-proto/src/hmac.rs
@@ -1,4 +1,4 @@
-use hmac::{Hmac, Mac};
+use hmac::{Hmac, KeyInit, Mac};
 use md5::Md5;
 use subtle::ConstantTimeEq;