diff --git a/lib/Voice/AudioEncoder.js b/lib/Voice/AudioEncoder.js
index ee9f0b747..84ec8e004 100644
--- a/lib/Voice/AudioEncoder.js
+++ b/lib/Voice/AudioEncoder.js
@@ -122,6 +122,8 @@ var AudioEncoder = (function () {
 	};
 
 	AudioEncoder.prototype.hookEncodingProcess = function hookEncodingProcess(resolve, reject, enc, stream) {
+		var _this4 = this;
+
 		var processKilled = false;
 
 		function killProcess(cause) {
@@ -160,7 +162,7 @@ var AudioEncoder = (function () {
 		this.volume.once("readable", function () {
 			var data = {
 				proc: enc,
-				stream: this.volume,
+				stream: _this4.volume,
 				channels: 2
 			};
 
diff --git a/src/Voice/AudioEncoder.js b/src/Voice/AudioEncoder.js
index 27ee545a0..ac4ac3335 100644
--- a/src/Voice/AudioEncoder.js
+++ b/src/Voice/AudioEncoder.js
@@ -130,7 +130,7 @@ export default class AudioEncoder {
 
 		enc.stdout.pipe(this.volume);
 
-		enc.stderr.on("data", function (data) {
+		enc.stderr.on("data", (data) => {
 			ffmpegErrors += "\n" + new Buffer(data).toString().trim();
 		});
 
@@ -148,7 +148,7 @@ export default class AudioEncoder {
 			}
 		});
 
-		this.volume.once("readable", function () {
+		this.volume.once("readable", () => {
 			var data = {
 				proc: enc,
 				stream: this.volume,