diff --git a/packages/SettingsProvider/src/android/provider/settings/backup/SecureSettings.java b/packages/SettingsProvider/src/android/provider/settings/backup/SecureSettings.java
index 8e35ee96b6916..86a97b678b918 100644
--- a/packages/SettingsProvider/src/android/provider/settings/backup/SecureSettings.java
+++ b/packages/SettingsProvider/src/android/provider/settings/backup/SecureSettings.java
@@ -146,6 +146,7 @@ public class SecureSettings {
         Settings.Secure.ACCESSIBILITY_INTERACTIVE_UI_TIMEOUT_MS,
         Settings.Secure.TRUST_AGENTS_EXTEND_UNLOCK,
         Settings.Secure.UI_NIGHT_MODE,
+        Settings.Secure.UI_NIGHT_MODE_CUSTOM_TYPE,
         Settings.Secure.DARK_THEME_CUSTOM_START_TIME,
         Settings.Secure.DARK_THEME_CUSTOM_END_TIME,
         Settings.Secure.LOCK_SCREEN_WHEN_TRUST_LOST,
diff --git a/packages/SettingsProvider/src/android/provider/settings/validators/SecureSettingsValidators.java b/packages/SettingsProvider/src/android/provider/settings/validators/SecureSettingsValidators.java
index 5f549fd05e1aa..581cf45008055 100644
--- a/packages/SettingsProvider/src/android/provider/settings/validators/SecureSettingsValidators.java
+++ b/packages/SettingsProvider/src/android/provider/settings/validators/SecureSettingsValidators.java
@@ -250,6 +250,7 @@ public class SecureSettingsValidators {
         VALIDATORS.put(Secure.ODI_CAPTIONS_ENABLED, BOOLEAN_VALIDATOR);
         VALIDATORS.put(Secure.DARK_MODE_DIALOG_SEEN, BOOLEAN_VALIDATOR);
         VALIDATORS.put(Secure.UI_NIGHT_MODE, NON_NEGATIVE_INTEGER_VALIDATOR);
+        VALIDATORS.put(Secure.UI_NIGHT_MODE_CUSTOM_TYPE, NON_NEGATIVE_INTEGER_VALIDATOR);
         VALIDATORS.put(Secure.DARK_THEME_CUSTOM_START_TIME, NONE_NEGATIVE_LONG_VALIDATOR);
         VALIDATORS.put(Secure.DARK_THEME_CUSTOM_END_TIME, NONE_NEGATIVE_LONG_VALIDATOR);
         VALIDATORS.put(Secure.GLOBAL_ACTIONS_PANEL_ENABLED, BOOLEAN_VALIDATOR);