diff --git a/bunyan-prettystream/bunyan-prettystream.d.ts b/bunyan-prettystream/bunyan-prettystream.d.ts
index 9f9fa4f574..12e399ea3a 100644
--- a/bunyan-prettystream/bunyan-prettystream.d.ts
+++ b/bunyan-prettystream/bunyan-prettystream.d.ts
@@ -1,6 +1,6 @@
-// Type definitions for bunyan-prettystream
+// Type definitions for bunyan-prettystream 0.1.3
 // Project: https://www.npmjs.com/package/bunyan-prettystream
-// Definitions by: Jason Swearingen <https://github.com/jasonswearingen/>
+// Definitions by: Jason Swearingen <https://github.com/jasonswearingen/>, Vadim Macagon <https://github.com/enlight/>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 /// <reference path="../node/node.d.ts" />
@@ -8,7 +8,23 @@
 declare module "bunyan-prettystream" {
 	import stream = require("stream");
 	class PrettyStream extends stream.Writable {
-		public pipe<T extends NodeJS.WritableStream>(destination: T, options?: { end?: boolean; }): T;
+		/**
+		 * @param options.mode Output format, can be either `long`, `short`, or `dev`,
+		 *                     defaults to `long`.
+		 * @param options.useColor Indicates whether or not output should be colored,
+		 *                         defaults to `true`.
+		 */
+		constructor(options?: { mode?: string; useColor?: boolean });
+
+		/**
+		 * Pipes data from this stream to another.
+		 *
+		 * @param destination Stream to write data to.
+		 * @param options.end Indicates whether `end()` should be called on the `destination`
+		 *                    stream when this stream emits `end`, defaults to `true`.
+		 * @return The `destination` stream.
+		 */
+		pipe<T extends NodeJS.WritableStream>(destination: T, options?: { end?: boolean; }): T;
 	}
 	export = PrettyStream;
 }
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