1 files changed, 6 insertions, 0 deletions
diff --git a/src/server/BlockImpl.hpp b/src/server/BlockImpl.hpp
index 845cd7df..b3064168 100644
--- a/src/server/BlockImpl.hpp
+++ b/src/server/BlockImpl.hpp
@@ -42,6 +42,7 @@ namespace Server {
 class Buffer;
 class BufferFactory;
 class Context;
+class Engine;
 class GraphImpl;
 class PluginImpl;
 class PortImpl;
@@ -83,6 +84,11 @@ public:
 	 */
 	virtual void deactivate();
 
+	/** Duplicate this Node. */
+	virtual BlockImpl* duplicate(Engine&             engine,
+	                             const Raul::Symbol& symbol,
+	                             GraphImpl*          parent) { return NULL; }
+
 	/** Return true iff this block is activated */
 	bool activated() const { return _activated; }