diff --git a/src/node_process_object.cc b/src/node_process_object.cc
index 587b4ecb936835..29f6569a45e5b2 100644
--- a/src/node_process_object.cc
+++ b/src/node_process_object.cc
@@ -211,6 +211,11 @@ void PatchProcessObject(const FunctionCallbackInfo<Value>& args) {
 
 void RegisterProcessExternalReferences(ExternalReferenceRegistry* registry) {
   registry->Register(RawDebug);
+  registry->Register(GetParentProcessId);
+  registry->Register(DebugPortSetter);
+  registry->Register(DebugPortGetter);
+  registry->Register(ProcessTitleSetter);
+  registry->Register(ProcessTitleGetter);
 }
 
 }  // namespace node