diff --git a/crates/rpc/src/validator.rs b/crates/rpc/src/validator.rs
index e826ccd..57ac2ad 100644
--- a/crates/rpc/src/validator.rs
+++ b/crates/rpc/src/validator.rs
@@ -22,6 +22,7 @@ pub struct ValidationError {
 
 impl ValidationError {
     /// Create a new validation error.
+    #[must_use]
     pub fn new(code: i64, message: impl Into<String>) -> Self {
         Self { code, message: message.into() }
     }
diff --git a/crates/traits/src/codec.rs b/crates/traits/src/codec.rs
index 26dd0c6..c43980d 100644
--- a/crates/traits/src/codec.rs
+++ b/crates/traits/src/codec.rs
@@ -11,6 +11,7 @@ pub struct CodecError(pub String);
 
 impl CodecError {
     /// Create a new codec error.
+    #[must_use]
     pub fn new(msg: impl Into<String>) -> Self {
         Self(msg.into())
     }