diff --git a/express-session/express-session.d.ts b/express-session/express-session.d.ts
index 5b9ec634a..156e9404f 100644
--- a/express-session/express-session.d.ts
+++ b/express-session/express-session.d.ts
@@ -69,6 +69,13 @@ declare module "express-session" {
 	  regenerate (req: express.Request, fn: (err: any) => any): void;
       load (sid: string, fn: (err: any, session: Express.Session) => any): void;
       createSession (req: express.Request, sess: Express.Session): void;
+      
+      get: (sid: string, callback: (err: any, session: Express.Session) => void) => void;
+      set: (sid: string, session: Express.Session, callback: (err: any) => void) => void;
+      destroy: (sid: string, callback: (err: any) => void) => void;
+      all: (callback: (err: any, obj: { [sid: string]: Express.Session; }) => void) => void;
+      length: (callback: (err: any, length: number) => void) => void;
+      clear: (callback: (err: any) => void) => void;
     }
 
     export class MemoryStore implements BaseMemoryStore {