diff --git a/include/fc/datastream.hpp b/include/fc/datastream.hpp
index 8a1eb11..8f2f56d 100644
--- a/include/fc/datastream.hpp
+++ b/include/fc/datastream.hpp
@@ -2,6 +2,7 @@
 #define _FC_DATASTREAM_HPP_
 #include <fc/utility.hpp>
 #include <fc/exception.hpp>
+#include <string.h>
 #include <stdint.h>
 
 namespace fc {
diff --git a/include/fc/raw.hpp b/include/fc/raw.hpp
index 0505a40..bb878e5 100644
--- a/include/fc/raw.hpp
+++ b/include/fc/raw.hpp
@@ -4,9 +4,12 @@
 #include <fc/datastream.hpp>
 #include <fc/varint.hpp>
 #include <fc/optional.hpp>
+#include <fc/vector.hpp>
 //#include <fc/value.hpp>
 
-namespace fc { namespace raw {
+namespace fc { 
+    class value; 
+    namespace raw {
 
     template<typename Stream, typename T>
     void unpack( Stream& s, fc::optional<T>& v );
diff --git a/include/fc/shared_ptr.hpp b/include/fc/shared_ptr.hpp
index c8f6f9f..0c97504 100644
--- a/include/fc/shared_ptr.hpp
+++ b/include/fc/shared_ptr.hpp
@@ -26,6 +26,12 @@ namespace fc {
   template<typename T>
   class shared_ptr {
     public:
+      template<typename Other>
+      shared_ptr( const shared_ptr<Other>& o )
+      :_ptr(o.get()) {
+        if(_ptr) _ptr->retain();
+      }
+      
       shared_ptr( T* t, bool inc = false )
       :_ptr(t) { if( inc ) t->retain();  }
 
@@ -70,6 +76,11 @@ namespace fc {
     private:
       T* _ptr;
   };
+
+  template<typename T, typename O>
+  fc::shared_ptr<T> dynamic_pointer_cast( const fc::shared_ptr<O>& t ) {
+    return fc::shared_ptr<T>( dynamic_cast<T*>(t.get()), true );
+  }
 }
 
 #endif
diff --git a/include/fc/static_reflect.hpp b/include/fc/static_reflect.hpp
index b8b69e5..d70a77b 100644
--- a/include/fc/static_reflect.hpp
+++ b/include/fc/static_reflect.hpp
@@ -8,6 +8,7 @@
 #ifndef _FC_STATIC_REFLECT_HPP_
 #define _FC_STATIC_REFLECT_HPP_
 
+#include <fc/utility.hpp>
 #include <boost/static_assert.hpp>
 #include <boost/preprocessor/seq/for_each_i.hpp>
 #include <boost/preprocessor/seq/for_each.hpp>