3 files changed, 4 insertions, 4 deletions
diff --git a/ext/ripper/tools/generate-eventids1.rb b/ext/ripper/tools/generate-eventids1.rb
index 3d9a57e034..ec7ec4949a 100755
--- a/ext/ripper/tools/generate-eventids1.rb
+++ b/ext/ripper/tools/generate-eventids1.rb
@@ -11,6 +11,6 @@ puts 'static void'
 puts 'ripper_init_eventids1()'
 puts '{'
 ids.each do |id|
-  puts %Q[    ripper_id_#{id} = rb_intern("on__#{id}");]
+  puts %Q[    ripper_id_#{id} = rb_intern("on_#{id}");]
 end
 puts '}'
diff --git a/ext/ripper/tools/generate-ripper_rb.rb b/ext/ripper/tools/generate-ripper_rb.rb
index b6fb166568..8a96e4cb1e 100755
--- a/ext/ripper/tools/generate-ripper_rb.rb
+++ b/ext/ripper/tools/generate-ripper_rb.rb
@@ -19,7 +19,7 @@ header
         id, arity = line.split
         arity = arity.to_i
         puts
-        puts "  def on__#{id}#{paramdecl(arity)}"
+        puts "  def on_#{id}#{paramdecl(arity)}"
         puts "    #{arity == 0 ? 'nil' : 'a'}"
         puts "  end"
       end
@@ -28,7 +28,7 @@ header
         id, arity = line.split
         arity = arity.to_i
         puts
-        puts "  def on__#{id}(token)"
+        puts "  def on_#{id}(token)"
         puts "    token"
         puts "  end"
       end
diff --git a/ext/ripper/tools/list-scan-event-ids.rb b/ext/ripper/tools/list-scan-event-ids.rb
index 28cd8bbe8a..670ae9ed09 100755
--- a/ext/ripper/tools/list-scan-event-ids.rb
+++ b/ext/ripper/tools/list-scan-event-ids.rb
@@ -17,7 +17,7 @@ def main
 end
 
 def extract_ids(f)
-  (f.read.scan(/ripper_id_(\w+)/).flatten - ['scan']).uniq
+  f.read.scan(/ripper_id_(\w+)/).flatten.uniq
 end
 
 main