diff --git a/mongodb/index.d.ts b/mongodb/index.d.ts
index f96c699a6f..58b3d7aa0c 100644
--- a/mongodb/index.d.ts
+++ b/mongodb/index.d.ts
@@ -1172,8 +1172,6 @@ export interface Cursor extends Readable {
     // http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#next
     next(): Promise<CursorResult>;
     next(callback: MongoCallback<CursorResult>): void;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#pipe
-    pipe(destination: Writable, options?: Object): this;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#project
     project(value: Object): Cursor;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#read
@@ -1184,8 +1182,6 @@ export interface Cursor extends Readable {
     rewind(): void;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#setCursorOption
     setCursorOption(field: string, value: Object): Cursor;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#setEncoding
-    setEncoding(encoding: string): this;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#setReadPreference
     setReadPreference(readPreference: string | ReadPreference): Cursor;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#showRecordId
@@ -1201,8 +1197,6 @@ export interface Cursor extends Readable {
     // http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#toArray
     toArray(): Promise<any[]>;
     toArray(callback: MongoCallback<any[]>): void;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#unpipe
-    unpipe(destination?: Writable): this;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/Cursor.html#unshift
     unshift(stream: Buffer | string): void;
 }
@@ -1260,8 +1254,6 @@ export interface AggregationCursor extends Readable {
     next(callback: MongoCallback<AggregationCursorResult>): void;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#out
     out(destination: string): AggregationCursor;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#pipe
-    pipe(destination: Writable, options?: Object): this;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#project
     project(document: Object): AggregationCursor;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#read
@@ -1271,16 +1263,12 @@ export interface AggregationCursor extends Readable {
     //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#rewind
     rewind(): AggregationCursor;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#setEncoding
-    setEncoding(encoding: string): this;
-    // http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#skip
     skip(value: number): AggregationCursor;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#sort
     sort(document: Object): AggregationCursor;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#toArray
     toArray(): Promise<any[]>;
     toArray(callback: MongoCallback<any[]>): void;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#unpipe
-    unpipe(destination?: Writable): this;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#unshift
     unshift(stream: Buffer | string): void;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/AggregationCursor.html#unwind
@@ -1305,21 +1293,15 @@ export interface CommandCursor extends Readable {
     // http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#next
     next(): Promise<AggregationCursorResult>;
     next(callback: MongoCallback<AggregationCursorResult>): void;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#pipe
-    pipe(destination: Writable, options?: Object): this;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#read
     read(size: number): string | Buffer | void;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#rewind
     rewind(): CommandCursor;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#setEncoding
-    setEncoding(encoding: string): this;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#setReadPreference
     setReadPreference(readPreference: string | ReadPreference): CommandCursor;
     // http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#toArray
     toArray(): Promise<any[]>;
     toArray(callback: MongoCallback<any[]>): void;
-    //http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#unpipe
-    unpipe(destination?: Writable): this;
     //http://mongodb.github.io/node-mongodb-native/2.1/api/CommandCursor.html#unshift
     unshift(stream: Buffer | string): void;
 }