diff --git a/src/pdf.js b/src/pdf.js
index 8a5527812..e522dac3d 100644
--- a/src/pdf.js
+++ b/src/pdf.js
@@ -43,7 +43,6 @@ import {
 import {
   build,
   getDocument,
-  LoopbackPort,
   PDFDataRangeTransport,
   PDFWorker,
   setPDFNetworkStreamFactory,
@@ -128,7 +127,6 @@ export {
   InvalidPDFException,
   isPdfFile,
   loadScript,
-  LoopbackPort,
   MissingPDFException,
   OPS,
   PasswordResponses,