diff --git a/libs/ardour/ardour/port_insert.h b/libs/ardour/ardour/port_insert.h
index f013a6a442..97f930df6e 100644
--- a/libs/ardour/ardour/port_insert.h
+++ b/libs/ardour/ardour/port_insert.h
@@ -60,6 +60,9 @@ class PortInsert : public IOProcessor
 	bool can_support_io_configuration (const ChanCount& in, ChanCount& out) const;
 	bool configure_io (ChanCount in, ChanCount out);
 
+	void activate ();
+	void deactivate ();
+
 	uint32_t bit_slot() const { return bitslot; }
 
   private:
diff --git a/libs/ardour/port_insert.cc b/libs/ardour/port_insert.cc
index a70718bd3e..eccd5f29f9 100644
--- a/libs/ardour/port_insert.cc
+++ b/libs/ardour/port_insert.cc
@@ -188,3 +188,19 @@ PortInsert::set_name (const std::string& name)
 
 	return ret;
 }
+
+void
+PortInsert::activate ()
+{
+	IOProcessor::activate ();
+
+	_out->activate ();
+}
+
+void
+PortInsert::deactivate ()
+{
+	IOProcessor::deactivate ();
+
+	_out->deactivate ();
+}