diff --git a/lib/lrama/new_parser.rb b/lib/lrama/new_parser.rb
index ad0f5ee6..cc8f2f6f 100644
--- a/lib/lrama/new_parser.rb
+++ b/lib/lrama/new_parser.rb
@@ -185,7 +185,7 @@ def build_token(type:, s_value:, line:, column:, alias_name: nil)
   3, 48, :_reduce_none,
   2, 48, :_reduce_none,
   2, 48, :_reduce_none,
-  2, 48, :_reduce_none,
+  2, 48, :_reduce_15,
   2, 48, :_reduce_16,
   0, 53, :_reduce_17,
   0, 54, :_reduce_18,
@@ -501,7 +501,12 @@ def _reduce_8(val, _values, result)
 
 # reduce 14 omitted
 
-# reduce 15 omitted
+module_eval(<<'.,.,', 'parser.y', 18)
+  def _reduce_15(val, _values, result)
+     val[1].each {|token| token.references = []; @grammar.lex_param = @grammar.build_code(:lex_param, token).token_code.s_value}
+    result
+  end
+.,.,
 
 module_eval(<<'.,.,', 'parser.y', 19)
   def _reduce_16(val, _values, result)
diff --git a/parser.y b/parser.y
index 22d0d3c4..eebff800 100644
--- a/parser.y
+++ b/parser.y
@@ -16,7 +16,7 @@ rule
                    | "%define" variable value
                    | "%require" STRING
                    | "%param" params
-                   | "%lex-param" params
+                   | "%lex-param" params { val[1].each {|token| token.references = []; @grammar.lex_param = @grammar.build_code(:lex_param, token).token_code.s_value} }
                    | "%parse-param" params { val[1].each {|token| token.references = []; @grammar.parse_param = @grammar.build_code(:parse_param, token).token_code.s_value} }
                    | "%initial-action" "{" {@lexer.status = :c_declaration; @lexer.end_symbol = '}'} C_DECLARATION {@lexer.status = :initial; @lexer.end_symbol = nil} "}"
                    | ";"