diff --git a/lib/index.d.ts b/lib/index.d.ts
index 974badd..6c43b03 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -39,6 +39,7 @@ declare module 'node-firebird' {
         sequentially(query: string, params: any[], rowCallback: SequentialCallback, callback: SimpleCallback, asArray?: boolean): Database;
         drop(callback: SimpleCallback): void;
         escape(value: any): string;
+        attachEvent(callback: any): this;
     }
 
     export interface Transaction {