diff --git a/osu.Game.Rulesets.Karaoke/UI/KaraokeSettingsSubsection.cs b/osu.Game.Rulesets.Karaoke/UI/KaraokeSettingsSubsection.cs
index f064818bb..a2b7a814b 100644
--- a/osu.Game.Rulesets.Karaoke/UI/KaraokeSettingsSubsection.cs
+++ b/osu.Game.Rulesets.Karaoke/UI/KaraokeSettingsSubsection.cs
@@ -73,7 +73,7 @@ private void load()
             // Device
             new SettingsMicrophoneDeviceDropdown
             {
-                ClassicDefault = null,
+                ClassicDefault = string.Empty,
                 LabelText = KaraokeSettingsSubsectionStrings.MicrophoneDevice,
                 Current = config.GetBindable<string>(KaraokeRulesetSetting.MicrophoneDevice)
             },