diff --git a/app/src/main/java/helium314/keyboard/settings/preferences/SliderPreference.kt b/app/src/main/java/helium314/keyboard/settings/preferences/SliderPreference.kt
index 1eae33b41..8a52a914d 100644
--- a/app/src/main/java/helium314/keyboard/settings/preferences/SliderPreference.kt
+++ b/app/src/main/java/helium314/keyboard/settings/preferences/SliderPreference.kt
@@ -26,7 +26,7 @@ fun <T: Number> SliderPreference(
     default: T,
     range: ClosedFloatingPointRange<Float>,
     stepSize: Int? = null,
-    onValueChanged: (Float) -> Unit = { },
+    onValueChanged: (Float?) -> Unit = { },
 ) {
     val ctx = LocalContext.current
     val prefs = ctx.prefs()
@@ -59,7 +59,7 @@ fun <T: Number> SliderPreference(
             },
             onValueChanged = onValueChanged,
             showDefault = true,
-            onDefault = { prefs.edit().remove(key).apply() },
+            onDefault = { prefs.edit().remove(key).apply(); onValueChanged(null) },
             intermediateSteps = stepSize?.let {
                 // this is not nice, but slider wants it like this...
                 ((range.endInclusive - range.start) / it - 1).toInt()
diff --git a/app/src/main/java/helium314/keyboard/settings/screens/PreferencesScreen.kt b/app/src/main/java/helium314/keyboard/settings/screens/PreferencesScreen.kt
index 584ae858c..70f29767c 100644
--- a/app/src/main/java/helium314/keyboard/settings/screens/PreferencesScreen.kt
+++ b/app/src/main/java/helium314/keyboard/settings/screens/PreferencesScreen.kt
@@ -172,7 +172,7 @@ fun createPreferencesSettings(context: Context) = listOf(
                 else stringResource(R.string.abbreviation_unit_milliseconds, it.toString())
             },
             range = -1f..100f,
-            onValueChanged = { AudioAndHapticFeedbackManager.getInstance().vibrate(it.toLong()) }
+            onValueChanged = { it?.let { AudioAndHapticFeedbackManager.getInstance().vibrate(it.toLong()) } }
         )
     },
     Setting(context, Settings.PREF_KEYPRESS_SOUND_VOLUME, R.string.prefs_keypress_sound_volume_settings) { setting ->
@@ -186,7 +186,7 @@ fun createPreferencesSettings(context: Context) = listOf(
                 else (it * 100).toInt().toString()
             },
             range = -0.01f..1f,
-            onValueChanged = { audioManager.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD, it) }
+            onValueChanged = { it?.let { audioManager.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD, it) } }
         )
     },
 )