diff --git a/libs/backends/alsa/alsa_audiobackend.cc b/libs/backends/alsa/alsa_audiobackend.cc
index d5e75b11ec..df5a7706ea 100644
--- a/libs/backends/alsa/alsa_audiobackend.cc
+++ b/libs/backends/alsa/alsa_audiobackend.cc
@@ -1251,8 +1251,8 @@ AlsaAudioBackend::set_port_property (PortHandle port, const std::string& key, co
 		return -1;
 	}
 	if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
-		 static_cast<AlsaPort*>(port)->set_pretty_name (value);
-		 return 0;
+		static_cast<AlsaPort*>(port)->set_pretty_name (value);
+		return 0;
 	}
 	return -1;
 }
diff --git a/libs/backends/coreaudio/coreaudio_backend.cc b/libs/backends/coreaudio/coreaudio_backend.cc
index a620bf0826..8dcdf79643 100644
--- a/libs/backends/coreaudio/coreaudio_backend.cc
+++ b/libs/backends/coreaudio/coreaudio_backend.cc
@@ -935,6 +935,20 @@ CoreAudioBackend::get_port_property (PortHandle port, const std::string& key, st
 	return -1;
 }
 
+int
+CoreAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
+{
+	if (!valid_port (port)) {
+		PBD::warning << _("CoreAudioBackend::set_port_property: Invalid Port(s)") << endmsg;
+		return -1;
+	}
+	if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
+		static_cast<CoreBackendPort*>(port)->set_pretty_name (value);
+		return 0;
+	}
+	return -1;
+}
+
 PortEngine::PortHandle
 CoreAudioBackend::get_port_by_name (const std::string& name) const
 {
diff --git a/libs/backends/coreaudio/coreaudio_backend.h b/libs/backends/coreaudio/coreaudio_backend.h
index e36e936918..11e8445ab5 100644
--- a/libs/backends/coreaudio/coreaudio_backend.h
+++ b/libs/backends/coreaudio/coreaudio_backend.h
@@ -330,6 +330,7 @@ class CoreAudioBackend : public AudioBackend {
 	std::string get_port_name (PortHandle) const;
 	PortHandle  get_port_by_name (const std::string&) const;
 	int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
+	int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
 
 	int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
 
diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc
index b168d4e32b..d1fe378e9f 100644
--- a/libs/backends/dummy/dummy_audiobackend.cc
+++ b/libs/backends/dummy/dummy_audiobackend.cc
@@ -684,13 +684,12 @@ DummyAudioBackend::set_port_property (PortHandle port, const std::string& key, c
 		return -1;
 	}
 	if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
-		 static_cast<DummyPort*>(port)->set_pretty_name (value);
-		 return 0;
+		static_cast<DummyPort*>(port)->set_pretty_name (value);
+		return 0;
 	}
 	return -1;
 }
 
-
 PortEngine::PortHandle
 DummyAudioBackend::get_port_by_name (const std::string& name) const
 {
diff --git a/libs/backends/jack/jack_audiobackend.h b/libs/backends/jack/jack_audiobackend.h
index 54eea35f02..847b21b767 100644
--- a/libs/backends/jack/jack_audiobackend.h
+++ b/libs/backends/jack/jack_audiobackend.h
@@ -133,6 +133,7 @@ class JACKAudioBackend : public AudioBackend {
     std::string get_port_name (PortHandle) const;
     PortHandle  get_port_by_name (const std::string&) const;
     int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
+    int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
 
     int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
 
diff --git a/libs/backends/jack/jack_portengine.cc b/libs/backends/jack/jack_portengine.cc
index 10b2efed6b..0b25ecbe01 100644
--- a/libs/backends/jack/jack_portengine.cc
+++ b/libs/backends/jack/jack_portengine.cc
@@ -147,6 +147,20 @@ JACKAudioBackend::get_port_property (PortHandle port, const std::string& key, st
 #endif
 }
 
+int
+JACKAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
+{
+#ifdef HAVE_JACK_METADATA // really everyone ought to have this by now.
+	int rv = -1;
+	jack_client_t* client = _jack_connection->jack();
+	jack_uuid_t uuid = jack_port_uuid((jack_port_t*) port);
+	return jack_set_property(client, uuid, key.c_str(), value.c_str(), type.c_str());
+	return rv;
+#else
+	return -1;
+#endif
+}
+
 PortEngine::PortHandle
 JACKAudioBackend:: get_port_by_name (const std::string& name) const
 {
diff --git a/libs/backends/portaudio/portaudio_backend.cc b/libs/backends/portaudio/portaudio_backend.cc
index 52049caea1..26e3264e1f 100644
--- a/libs/backends/portaudio/portaudio_backend.cc
+++ b/libs/backends/portaudio/portaudio_backend.cc
@@ -1238,6 +1238,24 @@ PortAudioBackend::get_port_property (PortHandle port,
 	return -1;
 }
 
+int
+PortAudioBackend::set_port_property (PortHandle port,
+                                     const std::string& key,
+                                     const std::string& value,
+                                     const std::string& type)
+{
+	if (!valid_port (port)) {
+		DEBUG_PORTS("get_port_name: Invalid Port(s)\n");
+		return -1;
+	}
+
+	if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
+		static_cast<PamPort*>(port)->set_pretty_name (value);
+		return 0;
+	}
+	return -1;
+}
+
 PortEngine::PortHandle
 PortAudioBackend::get_port_by_name (const std::string& name) const
 {
diff --git a/libs/backends/portaudio/portaudio_backend.h b/libs/backends/portaudio/portaudio_backend.h
index 3e329a42e0..601c3433cb 100644
--- a/libs/backends/portaudio/portaudio_backend.h
+++ b/libs/backends/portaudio/portaudio_backend.h
@@ -267,6 +267,7 @@ class PortAudioBackend : public AudioBackend {
 		std::string get_port_name (PortHandle) const;
 		PortHandle  get_port_by_name (const std::string&) const;
 		int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
+		int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
 
 		int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;