diff --git a/libs/backends/alsa/alsa_audiobackend.cc b/libs/backends/alsa/alsa_audiobackend.cc
index d81fbab9ee..55432e5857 100644
--- a/libs/backends/alsa/alsa_audiobackend.cc
+++ b/libs/backends/alsa/alsa_audiobackend.cc
@@ -1666,7 +1666,7 @@ AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port_handle, bool fo
 {
 	BackendPortPtr port = std::dynamic_pointer_cast<BackendPort> (port_handle);
 	if (!valid_port (port)) {
-		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "AlsaPort::set_latency_range (): invalid port.");
+		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "AlsaAudioBackend::set_latency_range (): invalid port.");
 		return;
 	}
 	port->set_latency_range (latency_range, for_playback);
@@ -1679,7 +1679,7 @@ AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port_handle, bool fo
 	LatencyRange   r;
 
 	if (!valid_port (port)) {
-		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "AlsaPort::get_latency_range (): invalid port.");
+		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "AlsaAudioBackend::get_latency_range (): invalid port.");
 		r.min = 0;
 		r.max = 0;
 		return r;
diff --git a/libs/backends/coreaudio/coreaudio_backend.cc b/libs/backends/coreaudio/coreaudio_backend.cc
index f9c245c6be..d939bd97eb 100644
--- a/libs/backends/coreaudio/coreaudio_backend.cc
+++ b/libs/backends/coreaudio/coreaudio_backend.cc
@@ -1158,7 +1158,7 @@ CoreAudioBackend::set_latency_range (PortEngine::PortHandle port_handle, bool fo
 {
 	std::shared_ptr<BackendPort> port = std::dynamic_pointer_cast<BackendPort> (port_handle);
 	if (!valid_port (port)) {
-		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "BackendPort::set_latency_range (): invalid port.");
+		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "CoreAudioBackend::set_latency_range (): invalid port.");
 		return;
 	}
 	port->set_latency_range (latency_range, for_playback);
@@ -1170,7 +1170,7 @@ CoreAudioBackend::get_latency_range (PortEngine::PortHandle port_handle, bool fo
 	std::shared_ptr<BackendPort> port = std::dynamic_pointer_cast<BackendPort> (port_handle);
 	LatencyRange r;
 	if (!valid_port (port)) {
-		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "BackendPort::get_latency_range (): invalid port.");
+		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "CoreAudioBackend::get_latency_range (): invalid port.");
 		r.min = 0;
 		r.max = 0;
 		return r;
diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc
index ae1e8edbe5..9c6f961e96 100644
--- a/libs/backends/dummy/dummy_audiobackend.cc
+++ b/libs/backends/dummy/dummy_audiobackend.cc
@@ -846,7 +846,7 @@ DummyAudioBackend::set_latency_range (PortEngine::PortHandle port_handle, bool f
 {
 	BackendPortPtr port = std::dynamic_pointer_cast<BackendPort> (port_handle);
 	if (!valid_port (port)) {
-		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "DummyPort::set_latency_range (): invalid port.");
+		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "DummyAudioBackend::set_latency_range (): invalid port.");
 		return;
 	}
 	port->set_latency_range (latency_range, for_playback);
@@ -858,7 +858,7 @@ DummyAudioBackend::get_latency_range (PortEngine::PortHandle port_handle, bool f
 	LatencyRange r;
 	BackendPortPtr port = std::dynamic_pointer_cast<BackendPort> (port_handle);
 	if (!valid_port (port)) {
-		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "DummyPort::get_latency_range (): invalid port.");
+		DEBUG_TRACE (PBD::DEBUG::BackendPorts, "DummyAudioBackend::get_latency_range (): invalid port.");
 		r.min = 0;
 		r.max = 0;
 		return r;
diff --git a/libs/backends/portaudio/portaudio_backend.cc b/libs/backends/portaudio/portaudio_backend.cc
index 66c6d56f45..5bc0a9cace 100644
--- a/libs/backends/portaudio/portaudio_backend.cc
+++ b/libs/backends/portaudio/portaudio_backend.cc
@@ -1428,7 +1428,7 @@ PortAudioBackend::set_latency_range (PortEngine::PortHandle port_handle, bool fo
 {
 	std::shared_ptr<BackendPort> port = std::dynamic_pointer_cast<BackendPort>(port_handle);
 	if (!valid_port (port)) {
-		DEBUG_PORTS("BackendPort::set_latency_range (): invalid port.\n");
+		DEBUG_PORTS ("PortAudioBackend::set_latency_range (): invalid port.\n");
 		return;
 	}
 	port->set_latency_range (latency_range, for_playback);
@@ -1440,7 +1440,7 @@ PortAudioBackend::get_latency_range (PortEngine::PortHandle port_handle, bool fo
 	std::shared_ptr<BackendPort> port = std::dynamic_pointer_cast<BackendPort>(port_handle);
 	LatencyRange r;
 	if (!valid_port (port)) {
-		DEBUG_PORTS("BackendPort::get_latency_range (): invalid port.\n");
+		DEBUG_PORTS ("PortAudioBackend::get_latency_range (): invalid port.\n");
 		r.min = 0;
 		r.max = 0;
 		return r;
diff --git a/libs/backends/pulseaudio/pulseaudio_backend.cc b/libs/backends/pulseaudio/pulseaudio_backend.cc
index 9d4ea88014..e6fd11b399 100644
--- a/libs/backends/pulseaudio/pulseaudio_backend.cc
+++ b/libs/backends/pulseaudio/pulseaudio_backend.cc
@@ -895,7 +895,7 @@ PulseAudioBackend::set_latency_range (PortEngine::PortHandle port_handle, bool f
 {
 	BackendPortPtr port = std::dynamic_pointer_cast<BackendPort> (port_handle);
 	if (!valid_port (port)) {
-		PBD::error << _("PulsePort::set_latency_range (): invalid port.") << endmsg;
+		PBD::error << _("PulseAudioBackend::set_latency_range (): invalid port.") << endmsg;
 	}
 	port->set_latency_range (latency_range, for_playback);
 }
@@ -907,7 +907,7 @@ PulseAudioBackend::get_latency_range (PortEngine::PortHandle port_handle, bool f
 	LatencyRange r;
 
 	if (!valid_port (port)) {
-		PBD::error << _("PulsePort::get_latency_range (): invalid port.") << endmsg;
+		PBD::error << _("PulseAudioBackend::get_latency_range (): invalid port.") << endmsg;
 		r.min = 0;
 		r.max = 0;
 		return r;