diff --git a/spec.emu b/spec.emu
index 6394bf2b..c350eb7d 100644
--- a/spec.emu
+++ b/spec.emu
@@ -260,7 +260,8 @@ location: https://github.com/tc39/proposal-decimal/
       <h1>
         EnsureDecimal128Value (
           _coefficient_ : a mathematical value,
-          _intendedExponent_ : a mathematical value
+          _intendedExponent_ : a mathematical value,
+          _roundingMode_: a Decimal128 rounding mode
         ): either a normal completion containing a Decimal128 value or a throw completion
       </h1>
       <dl class="header">
@@ -271,8 +272,8 @@ location: https://github.com/tc39/proposal-decimal/
         1. If -6111 ≤ _intendedExponent_ ≤ 6176, then
           1. If _coefficient_ × 10<sup>_intendedExponent_</sup> is an integer _n_ such that 0 < abs(_n_) < 10<sup>34</sup>, return « _coefficient, _intendedExponent_ ».
           1. Throw a *RangeError* exception.
-        1. If _intendedExponent_ < 0, return ? EnsureDecimal128Value(_coefficient_ / 10, _intendedExponent_ + 1).
-        1. Return ? EnsureDecimal128Value(_coefficient_ × 10, _intendedExponent_ + 1).
+        1. If _intendedExponent_ < 0, return ? EnsureDecimal128Value(_coefficient_ / 10, _intendedExponent_ + 1, _roundingMode_).
+        1. Return ? EnsureDecimal128Value(_coefficient_ × 10, _intendedExponent_ + 1, _roundingMode_).
       </emu-alg>
     </emu-clause>
   </emu-clause>
@@ -372,7 +373,7 @@ location: https://github.com/tc39/proposal-decimal/
         1. If _d2_ is *+∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
         1. If _d2_ is *-∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*-∞*<sub>𝔻</sub>).
         1. Return Decimal128ValueToObject(*-∞*<sub>𝔻</sub>).
-      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(_d1_[0] + _d2_[0], min(_d1_[1], _d2_[1]))).
+      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(_d1_[0] + _d2_[0], min(_d1_[1], _d2_[1]), *"halfEven"*)).
     </emu-alg>
   </emu-clause>
 
@@ -394,7 +395,7 @@ location: https://github.com/tc39/proposal-decimal/
         1. If _d2_ is *+∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*-∞*<sub>𝔻</sub>).
         1. If _d2_ is *-∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
         1. Return Decimal128ValueToObject(*-∞*<sub>𝔻</sub>).
-      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(d1[0] - d2[0], min(d1[1], d2[1]))).
+      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(d1[0] - d2[0], min(d1[1], d2[1]), *"halfEven"*)).
     </emu-alg>
   </emu-clause>
 
@@ -419,7 +420,7 @@ location: https://github.com/tc39/proposal-decimal/
         1. If _d2_ is a zero Decimal128 value, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
         1. If _d2_[0] < 0, return Decimal128ValueToObject(*+∞*<sub>𝔻</sub>).
         1. Return Decimal128ValueToObject(*-∞*<sub>𝔻</sub>).
-      1. Return Decimal128ValueToObject(? EnsureDecimal128Value (_d1_[0] × _d2_[0], _d1_[1] + _d2_[1])).
+      1. Return Decimal128ValueToObject(? EnsureDecimal128Value (_d1_[0] × _d2_[0], _d1_[1] + _d2_[1], *"halfEven"*)).
     </emu-alg>
   </emu-clause>
 
@@ -435,7 +436,7 @@ location: https://github.com/tc39/proposal-decimal/
       1. If _d1_ or _d2_ is *NaN*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
       1. If _d1_ is *+∞*<sub>𝔻</sub> or *-∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
       1. If _d2_ is *-∞*<sub>𝔻</sub> or *-∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
-      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(_d1_[0] / _d2_[0], _d1_[1] + _d2_[1])).
+      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(_d1_[0] / _d2_[0], _d1_[1] + _d2_[1], *"halfEven"*)).
     </emu-alg>
   </emu-clause>
 
@@ -451,7 +452,7 @@ location: https://github.com/tc39/proposal-decimal/
       1. If _d1_ or _d2_ is *NaN*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
       1. If _d1_ is *+∞*<sub>𝔻</sub> or *-∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
       1. If _d1_ is *-∞*<sub>𝔻</sub> or *-∞*<sub>𝔻</sub>, return Decimal128ValueToObject(*NaN*<sub>𝔻</sub>).
-      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(_d1_[0] % _d2_[0], _d1_[1] + _d2_[1])).
+      1. Return Decimal128ValueToObject(? EnsureDecimal128Value(_d1_[0] % _d2_[0], _d1_[1] + _d2_[1], *"halfEven"*)).
     </emu-alg>
     <emu-note>
       <p>The remainder operation specified here deviates from the IEEE 754 remainder operation. We follow the <emu-xref href="#sec-numeric-types-number-remainder">the remainder operation for Number</emu-xref> rather than IEEE 754, which specifies that, for example, the remainder 46 and 10 is -4 rather than 6.</p>
@@ -558,7 +559,7 @@ location: https://github.com/tc39/proposal-decimal/
       1. If _v_ is *-0*<sub>𝔻</sub>, return _O_.
       1. Let _n_ be the integer such that v × 10<sup>-_q_</sup> = _n_ and 0 < abs(_n_) < 10<sup>34</sup>.
       1. Let _N_ be ? OrdinaryCreateFromConstructor(%Decimal128%, *"%Decimal128.prototype%"*, « [[Decimal128Data]] »).
-      1. Set _N_.[[Decimal128Data]] to ? EnsureDecimal128Value(v × 10<sup>-_numFractionalDigits_</sup>, _q_ + _numFractionalDigits_).
+      1. Set _N_.[[Decimal128Data]] to ? EnsureDecimal128Value(v × 10<sup>-_numFractionalDigits_</sup>, _q_ + _numFractionalDigits_, _roundingMode_).
       1. Return _N_.
     </emu-alg>
     <emu-note>
@@ -636,7 +637,7 @@ location: https://github.com/tc39/proposal-decimal/
       1. Let _n_ be the integer such that v × 10<sup>-_q_</sup> = _n_ and 0 < abs(_n_) < 10<sup>34</sup>.
       1. Let _n1_ be the largest multiple of 10 such that _n_ - _n1_ is less than 10<sup>_precision_</sup>.
       1. Let _v1_ be _v_ - (_n1_ / 10<sup>_precision_</sup>).
-      1. Let _N_ be ? EnsureDecimal128Value(_v1_, _precision_).
+      1. Let _N_ be ? EnsureDecimal128Value(_v1_, _precision_, *"halfEven"*).
       1. Return Decimal128ToDecimalString(_N_).
     </emu-alg>
   </emu-clause>