diff --git a/libs/backends/alsa/alsa_audiobackend.cc b/libs/backends/alsa/alsa_audiobackend.cc
index 20ae17081b..f957437711 100644
--- a/libs/backends/alsa/alsa_audiobackend.cc
+++ b/libs/backends/alsa/alsa_audiobackend.cc
@@ -844,7 +844,7 @@ AlsaAudioBackend::register_system_audio_ports()
 		snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
 		PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
 		if (!p) return -1;
-		set_latency_range (p, false, lr);
+		set_latency_range (p, true, lr);
 		_system_outputs.push_back(static_cast<AlsaPort*>(p));
 	}
 	return 0;
@@ -936,7 +936,7 @@ AlsaAudioBackend::register_system_midi_ports()
 		snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
 		PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
 		if (!p) return -1;
-		set_latency_range (p, false, lr);
+		set_latency_range (p, true, lr);
 		_system_midi_out.push_back(static_cast<AlsaPort*>(p));
 	}
 
diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc
index 5af4f3066c..1f918e7ed7 100644
--- a/libs/backends/dummy/dummy_audiobackend.cc
+++ b/libs/backends/dummy/dummy_audiobackend.cc
@@ -648,7 +648,7 @@ DummyAudioBackend::register_system_ports()
 		snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
 		PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
 		if (!p) return -1;
-		set_latency_range (p, false, lr);
+		set_latency_range (p, true, lr);
 	}
 
 	/* midi ports */
@@ -667,7 +667,7 @@ DummyAudioBackend::register_system_ports()
 		snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
 		PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
 		if (!p) return -1;
-		set_latency_range (p, false, lr);
+		set_latency_range (p, true, lr);
 	}
 
 	return 0;