diff --git a/types/socket.io/index.d.ts b/types/socket.io/index.d.ts
index 41863235ba..0d77110716 100644
--- a/types/socket.io/index.d.ts
+++ b/types/socket.io/index.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for socket.io 1.4.4
 // Project: http://socket.io/
-// Definitions by: PROGRE <https://github.com/progre>, Damian Connolly <https://github.com/divillysausages>, Florent Poujol <https://github.com/florentpoujol>, KentarouTakeda <https://github.com/KentarouTakeda>
+// Definitions by: PROGRE <https://github.com/progre>, Damian Connolly <https://github.com/divillysausages>, Florent Poujol <https://github.com/florentpoujol>, KentarouTakeda <https://github.com/KentarouTakeda>, Alexey Snigirev <https://github.com/gigi>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 ///<reference types="node" />
@@ -64,6 +64,16 @@ declare namespace SocketIO {
 		 */
 		json: Server;
 
+		/**
+		 * Sets a modifier for a subsequent event emission that the event data may be lost if the clients are not ready to receive messages
+		 */
+		volatile: Server;
+
+		/**
+		 * Sets a modifier for a subsequent event emission that the event data will only be broadcast to the current node
+		 */
+		local: Server;
+
 		/**
 		 * Server request verification function, that checks for allowed origins
 		 * @param req The http.IncomingMessage request
diff --git a/types/socket.io/socket.io-tests.ts b/types/socket.io/socket.io-tests.ts
index 23c4a6d996..cd0cecf6cf 100644
--- a/types/socket.io/socket.io-tests.ts
+++ b/types/socket.io/socket.io-tests.ts
@@ -170,3 +170,13 @@ function testClosingServerWithoutCallback() {
     var io = socketIO.listen(80);
     io.close();
 }
+
+function testLocalServerMessages() {
+    var io = socketIO.listen(80);
+    io.local.emit('local', 'Local data');
+}
+
+function testVolatileServerMessages() {
+    var io = socketIO.listen(80);
+    io.volatile.emit('volatile', 'Lost data');
+}