diff --git a/polyfill/lib/ecmascript.mjs b/polyfill/lib/ecmascript.mjs
index ed98a16f11..bdfff3a579 100644
--- a/polyfill/lib/ecmascript.mjs
+++ b/polyfill/lib/ecmascript.mjs
@@ -4997,12 +4997,10 @@ export function AddDurationToOrSubtractDurationFromPlainYearMonth(operation, yea
   let { years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds } = duration;
   ({ days } = BalanceTimeDuration(days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, 'day'));
 
-  options = GetOptionsObject(options);
-
   const calendar = GetSlot(yearMonth, CALENDAR);
   const fieldNames = CalendarFields(calendar, ['monthCode', 'year']);
   const fields = PrepareTemporalFields(yearMonth, fieldNames, []);
-  const fieldsCopy = SnapshotOwnProperties(GetOptionsObject(fields), null);
+  const fieldsCopy = SnapshotOwnProperties(fields, null);
   fields.day = 1;
   let startDate = CalendarDateFromFields(calendar, fields);
   const sign = DurationSign(years, months, weeks, days, 0, 0, 0, 0, 0, 0);
@@ -5017,7 +5015,8 @@ export function AddDurationToOrSubtractDurationFromPlainYearMonth(operation, yea
     startDate = CalendarDateFromFields(calendar, fieldsCopy);
   }
   const durationToAdd = new Duration(years, months, weeks, days, 0, 0, 0, 0, 0, 0);
-  const optionsCopy = SnapshotOwnProperties(GetOptionsObject(options), null);
+  options = GetOptionsObject(options);
+  const optionsCopy = SnapshotOwnProperties(options, null);
   const addedDate = CalendarDateAdd(calendar, startDate, durationToAdd, options, dateAdd);
   const addedDateFields = PrepareTemporalFields(addedDate, fieldNames, []);
 
diff --git a/spec/plainyearmonth.html b/spec/plainyearmonth.html
index 00ed705565..82ed957b8a 100644
--- a/spec/plainyearmonth.html
+++ b/spec/plainyearmonth.html
@@ -664,7 +664,6 @@ <h1>
         1. If _operation_ is ~subtract~, then
           1. Set _duration_ to ! CreateNegatedTemporalDuration(_duration_).
         1. Let _balanceResult_ be ? BalanceTimeDuration(_duration_.[[Days]], _duration_.[[Hours]], _duration_.[[Minutes]], _duration_.[[Seconds]], _duration_.[[Milliseconds]], _duration_.[[Microseconds]], _duration_.[[Nanoseconds]], *"day"*).
-        1. Set _options_ to ? GetOptionsObject(_options_).
         1. Let _calendar_ be _yearMonth_.[[Calendar]].
         1. Let _fieldNames_ be ? CalendarFields(_calendar_, « *"monthCode"*, *"year"* »).
         1. Let _fields_ be ? PrepareTemporalFields(_yearMonth_, _fieldNames_, «»).
@@ -684,7 +683,8 @@ <h1>
         1. Else,
           1. Let _date_ be _intermediateDate_.
         1. Let _durationToAdd_ be ! CreateTemporalDuration(_duration_.[[Years]], _duration_.[[Months]], _duration_.[[Weeks]], _balanceResult_.[[Days]], 0, 0, 0, 0, 0, 0).
-        1. Let _optionsCopy_ be ? SnapshotOwnProperties(? GetOptionsObject(_options_), *null*).
+        1. Set _options_ to ? GetOptionsObject(_options_).
+        1. Let _optionsCopy_ be ? SnapshotOwnProperties(_options_, *null*).
         1. Let _addedDate_ be ? CalendarDateAdd(_calendar_, _date_, _durationToAdd_, _options_, _dateAdd_).
         1. Let _addedDateFields_ be ? PrepareTemporalFields(_addedDate_, _fieldNames_, «»).
         1. Return ? CalendarYearMonthFromFields(_calendar_, _addedDateFields_, _optionsCopy_).