diff --git a/src/server/auth/clients.ts b/src/server/auth/clients.ts
index 4e3f8e17e..345594dcb 100644
--- a/src/server/auth/clients.ts
+++ b/src/server/auth/clients.ts
@@ -10,13 +10,13 @@ export interface OAuthRegisteredClientsStore {
     getClient(clientId: string): OAuthClientInformationFull | undefined | Promise<OAuthClientInformationFull | undefined>;
 
     /**
-     * Registers a new client with the server. The client ID and secret will be automatically generated by the library. A modified version of the client information can be returned to reflect specific values enforced by the server.
+     * Registers a new client with the server. The client ID and secret will be automatically generated by the library if clientRegistrationOptions.clientIdGeneration is not explicitly set to false. A modified version of the client information can be returned to reflect specific values enforced by the server.
      *
      * NOTE: Implementations should NOT delete expired client secrets in-place. Auth middleware provided by this library will automatically check the `client_secret_expires_at` field and reject requests with expired secrets. Any custom logic for authenticating clients should check the `client_secret_expires_at` field as well.
      *
      * If unimplemented, dynamic client registration is unsupported.
      */
     registerClient?(
-        client: Omit<OAuthClientInformationFull, 'client_id' | 'client_id_issued_at'>
+        client: Omit<OAuthClientInformationFull, 'client_id' | 'client_id_issued_at'> & { client_id?: string; client_id_issued_at?: number }
     ): OAuthClientInformationFull | Promise<OAuthClientInformationFull>;
 }