diff --git a/lib/parser/lexer.rl b/lib/parser/lexer.rl
index 953706cfb..52efae944 100644
--- a/lib/parser/lexer.rl
+++ b/lib/parser/lexer.rl
@@ -833,6 +833,8 @@ class Parser::Lexer
 
     if !@static_env.nil? && @static_env.declared?(tok)
       fnext expr_endfn; fbreak;
+    elsif @version >= 33 && tok =~ /\A_[1-9]\z/
+      fnext expr_endfn; fbreak;
     else
       fnext *arg_or_cmdarg(cmd_state); fbreak;
     end
diff --git a/test/test_parser.rb b/test/test_parser.rb
index e1c641137..c64e93508 100644
--- a/test/test_parser.rb
+++ b/test/test_parser.rb
@@ -10468,6 +10468,27 @@ def test_reserved_for_numparam__since_30
     end
   end
 
+  def test_numparam_ruby_bug_19025
+    assert_diagnoses_many(
+      [
+        [:warning, :ambiguous_prefix, { :prefix => '**' }],
+        [:error, :unexpected_token, { :token => 'tDSTAR' }]
+      ],
+      'p { [_1 **2] }',
+      %w[3.0 3.1 3.2])
+
+    assert_parses(
+      s(:numblock,
+        s(:send, nil, :p), 1,
+        s(:array,
+          s(:send,
+            s(:lvar, :_1), :**,
+            s(:int, 2)))),
+      'p { [_1 **2] }',
+      %q{},
+      SINCE_3_3)
+  end
+
   def test_endless_setter
     assert_diagnoses(
       [:error, :endless_setter],