diff --git a/express-serve-static-core/express-serve-static-core.d.ts b/express-serve-static-core/express-serve-static-core.d.ts
index daa7b6cd0f..3bfe0a7daf 100644
--- a/express-serve-static-core/express-serve-static-core.d.ts
+++ b/express-serve-static-core/express-serve-static-core.d.ts
@@ -29,9 +29,9 @@ declare module "express-serve-static-core" {
         (err: any, req: Request, res: Response, next: NextFunction): any;
     }
 
-    type PathParams = string | RegExp | (string | RegExp)[]
+    type PathParams = string | RegExp | (string | RegExp)[];
     
-    type RequestHandlerParams = RequestHandler | ErrorRequestHandler
+    type RequestHandlerParams = RequestHandler | ErrorRequestHandler;
 
     interface IRouterMatcher<T> {
         (path: PathParams, ...handlers: RequestHandler[]): T;
@@ -73,11 +73,12 @@ declare module "express-serve-static-core" {
             * @param name
             * @param fn
             */
-        param(name: string | string[], handler: RequestParamHandler): this;
-        param(name: string | string[], matcher: RegExp): this;
-        param(name: string | string[], mapper: (param: any) => any): this;
-        // Alternatively, you can pass only a callback, in which case you have the opportunity to alter the app.param() API
-        param(callback: (name: string, matcher: RegExp) => RequestParamHandler): this;
+        param: {
+            (name: string, handler: RequestParamHandler): this;
+            // Alternatively, you can pass only a callback, in which case you have the opportunity to alter the app.param() API
+            // deprecated since express 4.11.0
+            (callback: (name: string, matcher: RegExp) => RequestParamHandler): this;
+        };
 
         /**
             * Special-cased "all" method, applying the given route `path`,
@@ -807,7 +808,7 @@ declare module "express-serve-static-core" {
     interface Handler extends RequestHandler { }
 
     interface RequestParamHandler {
-        (req: Request, res: Response, next: NextFunction, param: any): any;
+        (req: Request, res: Response, next: NextFunction, value: any, name: string): any;
     }
 
     interface Application extends IRouter, Express.Application {
@@ -872,6 +873,13 @@ declare module "express-serve-static-core" {
             */
         set(setting: string, val: any): Application;
         get: {(name: string): any;} & IRouterMatcher<this>;
+        
+        param: {
+            (name: string | string[], handler: RequestParamHandler): this;
+            // Alternatively, you can pass only a callback, in which case you have the opportunity to alter the app.param() API
+            // deprecated since express 4.11.0
+            param(callback: (name: string, matcher: RegExp) => RequestParamHandler): this;
+        };
 
         /**
             * Return the app's absolute pathname