diff --git a/lib/manager/VirtualStoredFSManager.d.ts b/lib/manager/VirtualStoredFSManager.d.ts
index cd4aff04..ea7a4178 100644
--- a/lib/manager/VirtualStoredFSManager.d.ts
+++ b/lib/manager/VirtualStoredFSManager.d.ts
@@ -23,8 +23,8 @@ export declare abstract class VirtualStoredContentManager implements IVirtualSto
     allocate(options: any, callback: ReturnCallback<string>): any;
 }
 export interface IVirtualStoredContentManagerMiddleware {
-    readStream(stream: Readable, callback: (stream: Readable) => void): any;
-    writeStream(stream: Writable, callback: (stream: Writable) => void): any;
+    readStream(uid: string, stream: Readable, callback: (stream: Readable) => void): any;
+    writeStream(uid: string, stream: Writable, callback: (stream: Writable) => void): any;
 }
 export declare class SimpleVirtualStoredContentManager extends VirtualStoredContentManager {
     storeFolderPath: string;
diff --git a/lib/manager/VirtualStoredFSManager.js b/lib/manager/VirtualStoredFSManager.js
index 7293eaaf..26895217 100644
--- a/lib/manager/VirtualStoredFSManager.js
+++ b/lib/manager/VirtualStoredFSManager.js
@@ -76,7 +76,7 @@ var SimpleVirtualStoredContentManager = (function (_super) {
                 if (!_this.middleware)
                     callback(null, stream);
                 else
-                    _this.middleware.readStream(stream, function (s) { return callback(null, s); });
+                    _this.middleware.readStream(contentUid, stream, function (s) { return callback(null, s); });
             }
         });
     };
@@ -91,7 +91,7 @@ var SimpleVirtualStoredContentManager = (function (_super) {
                 if (!_this.middleware)
                     callback(null, stream);
                 else
-                    _this.middleware.writeStream(stream, function (s) { return callback(null, s); });
+                    _this.middleware.writeStream(contentUid, stream, function (s) { return callback(null, s); });
             }
         });
     };
diff --git a/src/manager/VirtualStoredFSManager.ts b/src/manager/VirtualStoredFSManager.ts
index f281c906..96e267ee 100644
--- a/src/manager/VirtualStoredFSManager.ts
+++ b/src/manager/VirtualStoredFSManager.ts
@@ -56,8 +56,8 @@ export abstract class VirtualStoredContentManager implements IVirtualStoredConte
 
 export interface IVirtualStoredContentManagerMiddleware
 {
-    readStream(stream : Readable, callback : (stream : Readable) => void);
-    writeStream(stream : Writable, callback : (stream : Writable) => void);
+    readStream(uid : string, stream : Readable, callback : (stream : Readable) => void);
+    writeStream(uid : string, stream : Writable, callback : (stream : Writable) => void);
 }
 
 export class SimpleVirtualStoredContentManager extends VirtualStoredContentManager
@@ -109,7 +109,7 @@ export class SimpleVirtualStoredContentManager extends VirtualStoredContentManag
                 if(!this.middleware)
                     callback(null, stream);
                 else
-                    this.middleware.readStream(stream, (s) => callback(null, s));
+                    this.middleware.readStream(contentUid, stream, (s) => callback(null, s));
             }
         })
     }
@@ -127,7 +127,7 @@ export class SimpleVirtualStoredContentManager extends VirtualStoredContentManag
                 if(!this.middleware)
                     callback(null, stream);
                 else
-                    this.middleware.writeStream(stream, (s) => callback(null, s));
+                    this.middleware.writeStream(contentUid, stream, (s) => callback(null, s));
             }
         })
     }