diff --git a/crates/rpc/rpc-builder/src/auth.rs b/crates/rpc/rpc-builder/src/auth.rs
index d3cbfb2fc..7fb527017 100644
--- a/crates/rpc/rpc-builder/src/auth.rs
+++ b/crates/rpc/rpc-builder/src/auth.rs
@@ -6,7 +6,6 @@ use jsonrpsee::{
     server::{AlreadyStoppedError, RpcModule},
     Methods,
 };
-use reth_engine_primitives::EngineTypes;
 use reth_rpc_api::servers::*;
 use reth_rpc_eth_types::EthSubscriptionIdProvider;
 use reth_rpc_layer::{
@@ -189,18 +188,10 @@ pub struct AuthRpcModule {
     pub(crate) inner: RpcModule<()>,
 }
 
-// === impl AuthRpcModule ===
-
 impl AuthRpcModule {
     /// Create a new `AuthRpcModule` with the given `engine_api`.
-    pub fn new<EngineApi, EngineT>(engine: EngineApi) -> Self
-    where
-        EngineT: EngineTypes,
-        EngineApi: EngineApiServer<EngineT>,
-    {
-        let mut module = RpcModule::new(());
-        module.merge(engine.into_rpc()).expect("No conflicting methods");
-        Self { inner: module }
+    pub fn new(engine: impl IntoEngineApiRpcModule) -> Self {
+        Self { inner: engine.into_rpc_module() }
     }
 
     /// Get a reference to the inner `RpcModule`.