diff --git a/lib/http.js b/lib/http.js
index 3d3fdd48c5..96f5b6a88a 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -1014,7 +1014,7 @@ function ClientRequest(options, cb) {
   var method = self.method = (options.method || 'GET').toUpperCase();
   self.path = options.path || '/';
   if (cb) {
-    self.on('response', cb);
+    self.once('response', cb);
   }
 
   if (!Array.isArray(options.headers)) {