diff --git a/sig/lrama/grammar/parameterizing_rules/builder.rbs b/sig/lrama/grammar/parameterizing_rules/builder.rbs
index a2c8ba07..8dcc6f07 100644
--- a/sig/lrama/grammar/parameterizing_rules/builder.rbs
+++ b/sig/lrama/grammar/parameterizing_rules/builder.rbs
@@ -7,14 +7,15 @@ module Lrama
         @token: Lexer::Token::Parameterizing
         @key: Symbol
         @rule_counter: Counter
-        @lhs: Lexer::Token
+        @lhs_tag: untyped
         @user_code: Lexer::Token::UserCode?
         @precedence_sym: Lexer::Token?
         @line: Integer?
+        @builder: Grammar::ParameterizingRules::Builder::Base
 
         def initialize: (Lexer::Token token, Counter rule_counter, untyped lhs_tag, Lexer::Token::UserCode? user_code, Lexer::Token? precedence_sym, Integer? line) -> void
         def build: () -> Array[Rule]
-        def build_token: () -> Lrama::Lexer::Token
+        def build_token: () -> Lexer::Token
         def create_builder: () -> void
         def validate_key!: () -> void
       end
diff --git a/sig/lrama/grammar/parameterizing_rules/builder/base.rbs b/sig/lrama/grammar/parameterizing_rules/builder/base.rbs
index 466bd0ce..e52a5878 100644
--- a/sig/lrama/grammar/parameterizing_rules/builder/base.rbs
+++ b/sig/lrama/grammar/parameterizing_rules/builder/base.rbs
@@ -3,6 +3,8 @@ module Lrama
     class ParameterizingRules
       class Builder
         class Base
+          attr_reader build_token: Lexer::Token::Ident
+
           def initialize: (Lexer::Token::Parameterizing token, Counter rule_counter, untyped lhs_tag, Lexer::Token::UserCode? user_code, Lexer::Token? precedence_sym, Integer? line) -> void
           def build: () -> Array[Rule]
 
@@ -10,7 +12,7 @@ module Lrama
           @token: Lexer::Token::Parameterizing
           @key: Symbol
           @rule_counter: Counter
-          @lhs: Lexer::Token
+          @lhs_tag: untyped
           @user_code: Lexer::Token::UserCode?
           @precedence_sym: Lexer::Token?
           @line: Integer?
diff --git a/sig/lrama/grammar/parameterizing_rules/builder/separated_list.rbs b/sig/lrama/grammar/parameterizing_rules/builder/separated_list.rbs
index dbdf6629..0f60670d 100644
--- a/sig/lrama/grammar/parameterizing_rules/builder/separated_list.rbs
+++ b/sig/lrama/grammar/parameterizing_rules/builder/separated_list.rbs
@@ -3,6 +3,8 @@ module Lrama
     class ParameterizingRules
       class Builder
         class SeparatedList < Base
+          @separator: Lexer::Token
+
           def initialize: (Lexer::Token token, Counter rule_counter, untyped lhs_tag, Lexer::Token::UserCode? user_code, Lexer::Token? precedence_sym, Integer? line) -> void
         end
       end
diff --git a/sig/lrama/grammar/parameterizing_rules/builder/separated_nonempty_list.rbs b/sig/lrama/grammar/parameterizing_rules/builder/separated_nonempty_list.rbs
index 461ce0ab..21cf3322 100644
--- a/sig/lrama/grammar/parameterizing_rules/builder/separated_nonempty_list.rbs
+++ b/sig/lrama/grammar/parameterizing_rules/builder/separated_nonempty_list.rbs
@@ -3,6 +3,8 @@ module Lrama
     class ParameterizingRules
       class Builder
         class SeparatedNonemptyList < Base
+          @separator: Lexer::Token
+
           def initialize: (Lexer::Token token, Counter rule_counter, untyped lhs_tag, Lexer::Token::UserCode? user_code, Lexer::Token? precedence_sym, Integer? line) -> void
         end
       end
diff --git a/sig/lrama/lexer/token/parameterizing.rbs b/sig/lrama/lexer/token/parameterizing.rbs
index 351beaf2..92f5d3bb 100644
--- a/sig/lrama/lexer/token/parameterizing.rbs
+++ b/sig/lrama/lexer/token/parameterizing.rbs
@@ -2,9 +2,9 @@ module Lrama
   class Lexer
     class Token
       class Parameterizing < Token
-        attr_accessor args: Array[Lrama::Lexer::Token]
+        attr_accessor args: Array[Lexer::Token]
 
-        def initialize: (s_value: String, ?alias_name: String, ?location: Location, ?args: Array[Lrama::Lexer::Token]) -> void
+        def initialize: (s_value: String, ?alias_name: String, ?location: Location, ?args: Array[Lexer::Token]) -> void
 
         def option?: () -> bool
         def nonempty_list?: () -> bool