diff --git a/app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsAdvancedScreen.kt b/app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsAdvancedScreen.kt
index a934fd36b..24255fe74 100644
--- a/app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsAdvancedScreen.kt
+++ b/app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsAdvancedScreen.kt
@@ -299,6 +299,7 @@ object SettingsAdvancedScreen : SearchableSettings {
                         try {
                             // OkHttp checks for valid values internally
                             Headers.Builder().add("User-Agent", it)
+                            context.toast(MR.strings.requires_app_restart)
                         } catch (_: IllegalArgumentException) {
                             context.toast(MR.strings.error_user_agent_string_invalid)
                             return@EditTextPreference false