diff --git a/rtc_base/nethelpers.cc b/rtc_base/nethelpers.cc
index 4702de71e4..c41e12492a 100644
--- a/rtc_base/nethelpers.cc
+++ b/rtc_base/nethelpers.cc
@@ -84,7 +84,7 @@ int ResolveHostname(const std::string& hostname, int family,
 
 // AsyncResolver
 AsyncResolver::AsyncResolver()
-    : SignalThread(false /* use_socket_server */), error_(-1) {}
+    : SignalThread(), error_(-1) {}
 
 AsyncResolver::~AsyncResolver() = default;
 
diff --git a/rtc_base/signalthread.cc b/rtc_base/signalthread.cc
index 3856dac99e..4bf7d7c4eb 100644
--- a/rtc_base/signalthread.cc
+++ b/rtc_base/signalthread.cc
@@ -18,9 +18,9 @@ namespace rtc {
 // SignalThread
 ///////////////////////////////////////////////////////////////////////////////
 
-SignalThread::SignalThread(bool use_socket_server)
+SignalThread::SignalThread()
     : main_(Thread::Current()),
-      worker_(this, use_socket_server),
+      worker_(this),
       state_(kInit),
       refcount_(1) {
   main_->SignalQueueDestroyed.connect(this,
diff --git a/rtc_base/signalthread.h b/rtc_base/signalthread.h
index 68b7f84085..2c11da4507 100644
--- a/rtc_base/signalthread.h
+++ b/rtc_base/signalthread.h
@@ -42,7 +42,7 @@ class SignalThread
     : public sigslot::has_slots<>,
       protected MessageHandler {
  public:
-  explicit SignalThread(bool use_socket_server = true);
+  SignalThread();
 
   // Context: Main Thread.  Call before Start to change the worker's name.
   bool SetName(const std::string& name, const void* obj);
@@ -104,10 +104,8 @@ class SignalThread
 
   class Worker : public Thread {
    public:
-    explicit Worker(SignalThread* parent, bool use_socket_server)
-        : Thread(use_socket_server
-                     ? SocketServer::CreateDefault()
-                     : std::unique_ptr<SocketServer>(new NullSocketServer())),
+    explicit Worker(SignalThread* parent)
+        : Thread(std::unique_ptr<SocketServer>(new NullSocketServer())),
           parent_(parent) {}
     ~Worker() override;
     void Run() override;