diff --git a/libraries/chain/db_management.cpp b/libraries/chain/db_management.cpp
index 7b1c1337..15466734 100644
--- a/libraries/chain/db_management.cpp
+++ b/libraries/chain/db_management.cpp
@@ -71,6 +71,30 @@ void database::wipe(const fc::path& data_dir, bool include_blocks)
       fc::remove_all( data_dir / "database" );
 }
 
+void database::open(
+   const fc::path& data_dir,
+   std::function<genesis_state_type()> genesis_loader )
+{
+   try
+   {
+      object_database::open(data_dir);
+
+      _block_id_to_block.open(data_dir / "database" / "block_num_to_block");
+
+      if( !find(global_property_id_type()) )
+         init_genesis(genesis_loader());
+
+      _pending_block.previous  = head_block_id();
+      _pending_block.timestamp = head_block_time();
+
+      auto last_block = _block_id_to_block.last();
+      if( last_block.valid() )
+         _fork_db.start_block( *last_block );
+   }
+   FC_CAPTURE_AND_RETHROW( (data_dir) )
+}
+
+
 void database::close(uint32_t blocks_to_rewind)
 {
    _pending_block_session.reset();
diff --git a/libraries/chain/include/graphene/chain/database.hpp b/libraries/chain/include/graphene/chain/database.hpp
index 9e29fca3..657253d2 100644
--- a/libraries/chain/include/graphene/chain/database.hpp
+++ b/libraries/chain/include/graphene/chain/database.hpp
@@ -103,8 +103,10 @@ namespace graphene { namespace chain {
           * @param data_dir Path to open or create database in
           * @param genesis_loader A callable object which returns the genesis state to initialize new databases on
           */
-         template<typename F>
-         void open(const fc::path& data_dir, F&& genesis_loader);
+          void open(
+             const fc::path& data_dir,
+             std::function<genesis_state_type()> genesis_loader );
+
          /**
           * @brief Rebuild object graph from block history and open detabase
           *
@@ -523,23 +525,4 @@ namespace graphene { namespace chain {
        }
    }
 
-   template<typename F>
-   void database::open(const fc::path& data_dir, F&& genesis_loader)
-   { try {
-         object_database::open(data_dir);
-
-         _block_id_to_block.open(data_dir / "database" / "block_num_to_block");
-
-         if( !find(global_property_id_type()) )
-            init_genesis(genesis_loader());
-
-         _pending_block.previous  = head_block_id();
-         _pending_block.timestamp = head_block_time();
-
-         auto last_block= _block_id_to_block.last();
-         if( last_block.valid() )
-            _fork_db.start_block( *last_block );
-
-   } FC_CAPTURE_AND_RETHROW( (data_dir) ) }
-
 } }