diff --git a/tap_core/src/eip_712_signed_message.rs b/tap_core/src/eip_712_signed_message.rs
index 3cee1bc9..b4b6487c 100644
--- a/tap_core/src/eip_712_signed_message.rs
+++ b/tap_core/src/eip_712_signed_message.rs
@@ -19,7 +19,7 @@ pub struct EIP712SignedMessage<M: SolStruct> {
     pub signature: Signature,
 }
 
-#[derive(Eq, PartialEq, Hash)]
+#[derive(Debug, Eq, PartialEq, Hash)]
 pub struct MessageId(pub [u8; 32]);
 
 impl<M: SolStruct> EIP712SignedMessage<M> {