diff --git a/libs/ardour/ardour/jack_port.h b/libs/ardour/ardour/jack_port.h
index c8add2c270..c3c31c938d 100644
--- a/libs/ardour/ardour/jack_port.h
+++ b/libs/ardour/ardour/jack_port.h
@@ -42,9 +42,7 @@ class JackPort : public virtual Port {
 	}
 	
 	int set_name (std::string str);
-
-	bool is_mine () const;
-
+	
 	int connected () const {
 		return jack_port_connected (_port);
 	}
diff --git a/libs/ardour/ardour/port.h b/libs/ardour/ardour/port.h
index c1e502727f..860dec994f 100644
--- a/libs/ardour/ardour/port.h
+++ b/libs/ardour/ardour/port.h
@@ -80,7 +80,6 @@ class Port : public virtual sigc::trackable {
 	virtual Buffer& get_buffer() = 0;
 	virtual std::string short_name() = 0;
 	virtual int set_name (std::string str) = 0;
-	virtual bool is_mine (jack_client_t *client) = 0;
 	virtual int reestablish () = 0;
 	virtual int connected () const = 0;
 	virtual bool connected_to (const std::string& portname) const = 0;