diff --git a/jukebox/child-process.js b/jukebox/child-process.js
index 3c0f23d..b395af1 100644
--- a/jukebox/child-process.js
+++ b/jukebox/child-process.js
@@ -10,6 +10,8 @@ module.exports.ChildProcessEmitter = class ChildProcessEmitter extends EventEmit
   constructor(command, logger) {
     super();
 
+    var emitter = this;
+
     this.logger = logger;
     this.stderrFilters = [];
 
@@ -19,11 +21,11 @@ module.exports.ChildProcessEmitter = class ChildProcessEmitter extends EventEmit
     this.childProcess = spawn(cmd, args);
 
     this.childProcess.on('error', function(err) {
-      this.logger.error("process error", { class: this.constructor.name, name: name, err: String(err).trim() });
+      emitter.logger.error("process error", { class: emitter.constructor.name, err: String(err).trim() });
     });
 
     this.childProcess.on('close', function(code, signal) {
-      this.logger.debug("process closed", { class: this.constructor.name, name: name, code: code, signal: signal });
+      emitter.logger.debug("process closed", { class: emitter.constructor.name, code: code, signal: signal });
     });
 
     this.childProcess.stdout.on('data', (data) => {
@@ -41,7 +43,7 @@ module.exports.ChildProcessEmitter = class ChildProcessEmitter extends EventEmit
       if (filtered) {
         return;
       }
-      this.logger.error('process stderr', { class: this.constructor.name, stderr: line});
+      emitter.logger.error('process stderr', { class: emitter.constructor.name, stderr: line});
     });
   }