diff --git a/src/engines.rs b/src/engines.rs
index 78d8f8a..8cf34a9 100644
--- a/src/engines.rs
+++ b/src/engines.rs
@@ -10,7 +10,7 @@ use axum::{
 use log::*;
 use tower::Service;
 
-use crate::storage::DatabaseDriver;
+use crate::{common::HttpError, storage::DatabaseDriver};
 
 #[derive(Clone)]
 /// State to be used to store the database pool
@@ -47,7 +47,7 @@ async fn engine_handler(
         }
     } else {
         // Otherwise, the mount path could not be found
-        (StatusCode::NOT_FOUND, "Mount path not found").into_response()
+        HttpError::simple(StatusCode::NOT_FOUND, "Secret engine mount path not found")
     }
 }
 
@@ -66,9 +66,9 @@ async fn call_router(engine: Router, mount_path: String, mut req: Request) -> Re
 /// HTTP error response for unknown engine types
 /// Occurs when the mount path is found in the database
 /// but the registered is unknown
-fn unknown_engine(engine_type: String) -> (StatusCode, String) {
+fn unknown_engine(engine_type: String) -> impl IntoResponse {
     error!("Engine type {} not implemented", engine_type);
-    (
+    HttpError::simple(
         StatusCode::INTERNAL_SERVER_ERROR,
         format!("Engine type {} not implemented", engine_type),
     )
diff --git a/src/engines/kv/structs.rs b/src/engines/kv/structs.rs
index 90b847b..6a29fe5 100644
--- a/src/engines/kv/structs.rs
+++ b/src/engines/kv/structs.rs
@@ -1,6 +1,5 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
-use zeroize::ZeroizeOnDrop;
 use std::{collections::HashMap, vec};
 
 pub type KvSecretData = HashMap<String, String>;