diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp
index 04e8d3d058..23d0761272 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp
@@ -174,7 +174,7 @@ Value get_option(GlobalObject& global_object, Object const& options, PropertyNam
 
 // 13.4 GetStringOrNumberOption ( options, property, stringValues, minimum, maximum, fallback ), https://tc39.es/proposal-temporal/#sec-getstringornumberoption
 template<typename NumberType>
-Optional<Variant<String, NumberType>> get_string_or_number_option(GlobalObject& global_object, Object& options, PropertyName const& property, Vector<StringView> const& string_values, NumberType minimum, NumberType maximum, Value fallback)
+Optional<Variant<String, NumberType>> get_string_or_number_option(GlobalObject& global_object, Object const& options, PropertyName const& property, Vector<StringView> const& string_values, NumberType minimum, NumberType maximum, Value fallback)
 {
     auto& vm = global_object.vm();
 
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.h b/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.h
index deed584a0b..3904ed0e3e 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.h
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.h
@@ -87,7 +87,7 @@ MarkedValueList iterable_to_list_of_type(GlobalObject&, Value items, Vector<Opti
 Object* get_options_object(GlobalObject&, Value options);
 Value get_option(GlobalObject&, Object const& options, PropertyName const& property, Vector<OptionType> const& types, Vector<StringView> const& values, Value fallback);
 template<typename NumberType>
-Optional<Variant<String, NumberType>> get_string_or_number_option(GlobalObject&, Object& options, PropertyName const& property, Vector<StringView> const& string_values, NumberType minimum, NumberType maximum, Value fallback);
+Optional<Variant<String, NumberType>> get_string_or_number_option(GlobalObject&, Object const& options, PropertyName const& property, Vector<StringView> const& string_values, NumberType minimum, NumberType maximum, Value fallback);
 Optional<String> to_temporal_overflow(GlobalObject&, Object& normalized_options);
 Optional<String> to_temporal_rounding_mode(GlobalObject&, Object& normalized_options, String const& fallback);
 Optional<String> to_show_calendar_option(GlobalObject&, Object& normalized_options);