diff --git a/spec.html b/spec.html
index 1372807ab7..119ebd3331 100644
--- a/spec.html
+++ b/spec.html
@@ -37120,15 +37120,15 @@ <h1>
         <emu-grammar>Atom :: `(?` RegularExpressionModifiers `:` Disjunction `)`</emu-grammar>
         <emu-alg>
           1. Let _addModifiers_ be the source text matched by |RegularExpressionModifiers|.
-          1. Let _removeModifiers_ be the empty String.
-          1. Let _modifiedRer_ be UpdateModifiers(_rer_, CodePointsToString(_addModifiers_), _removeModifiers_).
+          1. Let _removeModifiers_ be an empty List.
+          1. Let _modifiedRer_ be UpdateModifiers(_rer_, _addModifiers_, _removeModifiers_).
           1. Return CompileSubpattern of |Disjunction| with arguments _modifiedRer_ and _direction_.
         </emu-alg>
         <emu-grammar>Atom :: `(?` RegularExpressionModifiers `-` RegularExpressionModifiers `:` Disjunction `)`</emu-grammar>
         <emu-alg>
           1. Let _addModifiers_ be the source text matched by the first |RegularExpressionModifiers|.
           1. Let _removeModifiers_ be the source text matched by the second |RegularExpressionModifiers|.
-          1. Let _modifiedRer_ be UpdateModifiers(_rer_, CodePointsToString(_addModifiers_), CodePointsToString(_removeModifiers_)).
+          1. Let _modifiedRer_ be UpdateModifiers(_rer_, _addModifiers_, _removeModifiers_).
           1. Return CompileSubpattern of |Disjunction| with arguments _modifiedRer_ and _direction_.
         </emu-alg>
 
@@ -37282,8 +37282,8 @@ <h1>
           <h1>
             UpdateModifiers (
               _rer_: a RegExp Record,
-              _add_: a String,
-              _remove_: a String,
+              _add_: a sequence of Unicode code points,
+              _remove_: a sequence of Unicode code points,
             ): a RegExp Record
           </h1>
           <dl class="header">