diff --git a/lib/service/PiService.ts b/lib/service/PiService.ts
index bf0cd79..22f39e0 100644
--- a/lib/service/PiService.ts
+++ b/lib/service/PiService.ts
@@ -1,11 +1,11 @@
 import { Request, Response, Router, IRouterMatcher, Application } from "express";
-import { PiDbPoolFactoryFn, PiServiceOptions, PiExceptionHandlerParams } from "./types";
+import { PiServiceOptions, PiExceptionHandlerParams } from "./types";
 import { PiTypeDescriptor } from '@pomgui/rest-lib';
 import { PiDatabasePool, PiDatabase } from '@pomgui/database';
 
 var
     _router: Router = Router(),
-    _dbPool: PiDatabasePool | null;
+    _dbPool: PiDatabasePool | undefined;
 
 export function PiGET(path: string, options?: PiServiceOptions) { return decorator(path, _router.get, options) }
 export function PiPOST(path: string, options?: PiServiceOptions) { return decorator(path, _router.post, options) }
@@ -77,9 +77,8 @@ function decorator(path: string, defineRoute: IRouterMatcher<void>, options?: Pi
     }
 }
 
-export function PiService(config: { services: { new(): any }[], dbPoolFactoryFn?: PiDbPoolFactoryFn }): Router {
-    config.services.forEach(s => new s()); // Create an instance, just to access to the decorators
-    if (config.dbPoolFactoryFn)
-        _dbPool = config.dbPoolFactoryFn();
+export function PiService(config: { servicesList: { new(): any }[], dbPool?: PiDatabasePool }): Router {
+    config.servicesList.forEach(s => new s()); // Create an instance, just to access to the decorators
+    _dbPool = config.dbPool;
     return _router;
 }
diff --git a/lib/service/types.ts b/lib/service/types.ts
index 0d78534..5afd4d8 100644
--- a/lib/service/types.ts
+++ b/lib/service/types.ts
@@ -2,11 +2,6 @@ import { PiDatabase, PiDatabasePool } from "@pomgui/database"
 import { Request, Response } from "express"
 import { PiDescriptor } from '@pomgui/rest-lib'
 
-/**
- * Signature of the database factory function 
- */
-export type PiDbPoolFactoryFn = { (): PiDatabasePool | null; }
-
 export type PiServiceOptions = {
     customSend?: boolean;
     database?: boolean;