diff --git a/types/line-reader/index.d.ts b/types/line-reader/index.d.ts
index 31ab0348e7..8c0bdbedf3 100644
--- a/types/line-reader/index.d.ts
+++ b/types/line-reader/index.d.ts
@@ -3,6 +3,8 @@
 // Definitions by: Sam Saint-Pettersen <https://github.com/stpettersens>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
+/// <reference types="node"/>
+
 interface LineReaderOptions {
     separator?: any;
     encoding?: string;
@@ -12,10 +14,10 @@ interface LineReaderOptions {
 interface LineReader {
     eachLine(): Function; // For Promise.promisify;
     open(): Function;
-    eachLine(file: string, cb: (line: string, last?: boolean, cb?: Function) => void): LineReader;
-    eachLine(file: string, options: LineReaderOptions, cb: (line: string, last?: boolean, cb?: Function) => void): LineReader;
-    open(file: string, cb: (err: Error, reader: LineReader) => void): void;
-    open(file: string, options: LineReaderOptions, cb: (err: Error, reader: LineReader) => void): void;
+    eachLine(file: string | NodeJS.ReadableStream, cb: (line: string, last?: boolean, cb?: Function) => void): LineReader;
+    eachLine(file: string | NodeJS.ReadableStream, options: LineReaderOptions, cb: (line: string, last?: boolean, cb?: Function) => void): LineReader;
+    open(file: string | NodeJS.ReadableStream, cb: (err: Error, reader: LineReader) => void): void;
+    open(file: string | NodeJS.ReadableStream, options: LineReaderOptions, cb: (err: Error, reader: LineReader) => void): void;
     hasNextLine(): boolean;
     nextLine(cb: (err: Error, line: string) => void): void;
     close(cb: (err: Error) => void): void;