diff --git a/lib/workers/child.js b/lib/workers/child.js
index 02aad7f1..f6df990d 100644
--- a/lib/workers/child.js
+++ b/lib/workers/child.js
@@ -65,16 +65,11 @@ Child.prototype.init = function init(file) {
     this.emit('error', err);
   });
 
-  this.child.on('exit', (code, signal) => {
+  this.child.once('exit', (code, signal) => {
     children.delete(this);
     this.emit('exit', code == null ? -1 : code, signal);
   });
 
-  this.child.on('close', () => {
-    children.delete(this);
-    this.emit('exit', -1, null);
-  });
-
   this.child.stdin.on('error', (err) => {
     this.emit('error', err);
   });