1 files changed, 3 insertions, 3 deletions
diff --git a/src/libs/engine/OutputPort.h b/src/libs/engine/OutputPort.h
index 269a4524..25a03325 100644
--- a/src/libs/engine/OutputPort.h
+++ b/src/libs/engine/OutputPort.h
@@ -39,7 +39,7 @@ template <typename T> class InputPort;
  * \ingroup engine
  */
 template <typename T>
-class OutputPort : public TypedPort<T>
+class OutputPort : virtual public TypedPort<T>
 {
 public:
 	OutputPort(Node* parent, const string& name, size_t index, size_t poly, DataType type, size_t buffer_size);
@@ -55,8 +55,8 @@ private:
 	OutputPort(const OutputPort& copy);
 	OutputPort<T>& operator=(const OutputPort<T>&);
 	
-	using TypedPort<T>::m_is_tied;
-	using TypedPort<T>::m_tied_port;
+	//using TypedPort<T>::m_is_tied;
+	//using TypedPort<T>::m_tied_port;
 };