diff --git a/include/ConcurrentQueue.hpp b/include/ConcurrentQueue.hpp
index 161edbb..075492d 100644
--- a/include/ConcurrentQueue.hpp
+++ b/include/ConcurrentQueue.hpp
@@ -35,7 +35,7 @@ class ConcurrentQueue {
     void push(const T task)
     {
       TRACE(this);
-      ScopedLock sl(&m_mutex);
+      ScopedLock sl(m_mutex);
       if (m_cancelled) throw CancelledException();
       m_queue.push( task );
       m_condition.signal();
@@ -45,7 +45,7 @@ class ConcurrentQueue {
     bool tryPop(T &popped_value)
     {
       TRACE(this);
-      ScopedLock sl(&m_mutex);
+      ScopedLock sl(m_mutex);
       if (m_cancelled) throw CancelledException();
       if ( m_queue.empty() ) return false;
 
@@ -58,7 +58,7 @@ class ConcurrentQueue {
     T waitAndPop()
     {
       TRACE(this);
-      ScopedLock sl(&m_mutex);
+      ScopedLock sl(m_mutex);
 
       while ( m_queue.empty() and not m_cancelled) {
         m_condition.wait();
@@ -74,7 +74,7 @@ class ConcurrentQueue {
     bool empty() const
     {
       TRACE(this);
-      ScopedLock sl(&m_mutex);
+      ScopedLock sl(m_mutex);
       if (m_cancelled) throw CancelledException();
       return m_queue.empty();
     }
@@ -83,7 +83,7 @@ class ConcurrentQueue {
     void cancel()
     {
       TRACE(this);
-      ScopedLock sl(&m_mutex);
+      ScopedLock sl(m_mutex);
       m_cancelled = true;
       m_condition.broadcast();
     }
diff --git a/include/ScopedLock.hpp b/include/ScopedLock.hpp
index 85c551c..670aed9 100644
--- a/include/ScopedLock.hpp
+++ b/include/ScopedLock.hpp
@@ -9,7 +9,7 @@ class ScopedLock
 
 public:
 
-  ScopedLock( const Mutex* const mutex );
+  ScopedLock( Mutex& mutex );
   ~ScopedLock();
 
 private:
@@ -17,7 +17,7 @@ private:
   ScopedLock(const ScopedLock&);
   ScopedLock& operator=(const ScopedLock&);
 
-  const Mutex* const m_mutex;
+  Mutex& m_mutex;
 
 };
 
diff --git a/src/ScopedLock.cpp b/src/ScopedLock.cpp
index 05e8b22..8a3d198 100644
--- a/src/ScopedLock.cpp
+++ b/src/ScopedLock.cpp
@@ -2,15 +2,15 @@
 #include "Common.hpp"
 
 
-ScopedLock::ScopedLock( const Mutex* const mutex) : m_mutex(mutex)
+ScopedLock::ScopedLock( Mutex& mutex) : m_mutex(mutex)
 {
   TRACE(this);
-  const_cast<Mutex*>(m_mutex)->lock();
+  m_mutex.lock();
 }
 
 
 ScopedLock::~ScopedLock()
 {
   TRACE(this);
-  const_cast<Mutex*>(m_mutex)->unlock();
+  m_mutex.unlock();
 }