diff --git a/include/fc/thread/future.hpp b/include/fc/thread/future.hpp
index 85bdbd4..cf57a24 100644
--- a/include/fc/thread/future.hpp
+++ b/include/fc/thread/future.hpp
@@ -169,8 +169,15 @@ namespace fc {
     public:
       future( const fc::shared_ptr<promise<T>>& p ):m_prom(p){}
       future( fc::shared_ptr<promise<T>>&& p ):m_prom(fc::move(p)){}
+      future(const future<T>& f ) : m_prom(f.m_prom){}
       future(){}
 
+      future& operator=(future<T>&& f ) {
+        fc_swap(m_prom,f.m_prom); 
+        return *this;
+      }
+
+
       operator const T&()const { return wait(); }
       
       /// @pre valid()
@@ -219,7 +226,14 @@ namespace fc {
     public:
       future( const fc::shared_ptr<promise<void>>& p ):m_prom(p){}
       future( fc::shared_ptr<promise<void>>&& p ):m_prom(fc::move(p)){}
+      future(const future<void>& f ) : m_prom(f.m_prom){}
       future(){}
+
+      future& operator=(future<void>&& f ) {
+        fc_swap(m_prom,f.m_prom); 
+        return *this;
+      }
+
       
       /// @pre valid()
       /// @post ready()
diff --git a/src/thread/thread_d.hpp b/src/thread/thread_d.hpp
index 8f5237f..bac4aa0 100644
--- a/src/thread/thread_d.hpp
+++ b/src/thread/thread_d.hpp
@@ -217,8 +217,10 @@ namespace fc {
                 BOOST_ASSERT( this == thread::current().my );
                 
                 task_base* pending = 0; 
-
-                pending = task_in_queue.exchange(0,boost::memory_order_consume);
+                //DLN: changed from memory_order_consume for boost 1.55.
+                //This appears to be safest replacement for now, maybe
+                //can be changed to relaxed later, but needs analysis.
+                pending = task_in_queue.exchange(0,boost::memory_order_seq_cst);
                 if( pending ) { enqueue( pending ); }
 
                 task_base* p(0);