diff --git a/libdevcore/CMakeLists.txt b/libdevcore/CMakeLists.txt
index 27f6d43c2..bcea5399d 100644
--- a/libdevcore/CMakeLists.txt
+++ b/libdevcore/CMakeLists.txt
@@ -1,5 +1,5 @@
-file(GLOB SOURCES "*.cpp")
 file(GLOB HEADERS "*.h")
+file(GLOB SOURCES "*.cpp")
 
 find_package(Threads)
 
diff --git a/libdevcore/Guards.cpp b/libdevcore/Guards.cpp
deleted file mode 100644
index 69ae6c03a..000000000
--- a/libdevcore/Guards.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-	This file is part of cpp-ethereum.
-
-	cpp-ethereum is free software: you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	cpp-ethereum is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
-*/
-/** @file Guards.cpp
- * @author Gav Wood <i@gavwood.com>
- * @date 2014
- */
-
-#include "Guards.h"
-using namespace std;
-using namespace dev;
-
-namespace dev
-{
-
-}
diff --git a/libdevcore/Guards.h b/libdevcore/Guards.h
index 2f1509b9a..a65695863 100644
--- a/libdevcore/Guards.h
+++ b/libdevcore/Guards.h
@@ -29,11 +29,8 @@ namespace dev
 {
 
 using Mutex = std::mutex;
-using RecursiveMutex = std::recursive_mutex;
-
 using Guard = std::lock_guard<std::mutex>;
 using UniqueGuard = std::unique_lock<std::mutex>;
-using RecursiveGuard = std::lock_guard<std::recursive_mutex>;
 
 template <class GuardType, class MutexType>
 struct GenericGuardBool: GuardType
diff --git a/libdevcore/Worker.cpp b/libdevcore/Worker.cpp
index 6f667183d..bb567a4f3 100644
--- a/libdevcore/Worker.cpp
+++ b/libdevcore/Worker.cpp
@@ -92,9 +92,8 @@ void Worker::stopWorking()
 		}
 }
 
-void Worker::terminate()
+Worker::~Worker()
 {
-//	cnote << "stopWorking for thread" << m_name;
 	DEV_GUARDED(x_work)
 		if (m_work)
 		{
diff --git a/libdevcore/Worker.h b/libdevcore/Worker.h
index 4301639e4..386ba7f3c 100644
--- a/libdevcore/Worker.h
+++ b/libdevcore/Worker.h
@@ -30,13 +30,6 @@
 namespace dev
 {
 
-enum class IfRunning
-{
-	Fail,
-	Join,
-	Detach
-};
-
 enum class WorkerState
 {
 	Starting,
@@ -51,30 +44,16 @@ class Worker
 protected:
 	Worker(std::string const& _name = "anon", unsigned _idleWaitMs = 30): m_name(_name), m_idleWaitMs(_idleWaitMs) {}
 
-	/// Move-constructor.
-	Worker(Worker&& _m) { std::swap(m_name, _m.m_name); }
-
-	/// Move-assignment.
-	Worker& operator=(Worker&& _m)
-	{
-		assert(&_m != this);
-		std::swap(m_name, _m.m_name);
-		return *this;
-	}
+	Worker(Worker const&) = delete;
+	Worker& operator=(Worker const&) = delete;
 
-	virtual ~Worker() { terminate(); }
-
-	/// Allows changing worker name if work is stopped.
-	void setName(std::string _n) { if (!isWorking()) m_name = _n; }
+	virtual ~Worker();
 
 	/// Starts worker thread; causes startedWorking() to be called.
 	void startWorking();
 	
 	/// Stop worker thread; causes call to stopWorking().
 	void stopWorking();
-
-	/// Returns if worker thread is present.
-	bool isWorking() const { Guard l(x_work); return m_state == WorkerState::Started; }
 	
 	/// Called after thread is started from startWorking().
 	virtual void startedWorking() {}
@@ -89,13 +68,7 @@ protected:
 	/// Called when is to be stopped, just prior to thread being joined.
 	virtual void doneWorking() {}
 
-	/// Blocks caller into worker thread has finished.
-//	void join() const { Guard l(x_work); try { if (m_work) m_work->join(); } catch (...) {} }
-
 private:
-	/// Stop and never start again.
-	void terminate();
-
 	std::string m_name;
 
 	unsigned m_idleWaitMs = 0;