diff --git a/lib/rb/ext/binary_protocol_accelerated.h b/lib/rb/ext/binary_protocol_accelerated.h
index 342e65b..37baf41 100644
--- a/lib/rb/ext/binary_protocol_accelerated.h
+++ b/lib/rb/ext/binary_protocol_accelerated.h
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information
diff --git a/lib/rb/ext/compact_protocol.h b/lib/rb/ext/compact_protocol.h
index 0bd26e9..163915e 100644
--- a/lib/rb/ext/compact_protocol.h
+++ b/lib/rb/ext/compact_protocol.h
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information
diff --git a/lib/rb/ext/constants.h b/lib/rb/ext/constants.h
index fce7cf5..2b18081 100644
--- a/lib/rb/ext/constants.h
+++ b/lib/rb/ext/constants.h
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information
diff --git a/lib/rb/ext/macros.h b/lib/rb/ext/macros.h
index 3826e65..300b1cc 100644
--- a/lib/rb/ext/macros.h
+++ b/lib/rb/ext/macros.h
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information
diff --git a/lib/rb/ext/memory_buffer.h b/lib/rb/ext/memory_buffer.h
index 6df2225..b277fa6 100644
--- a/lib/rb/ext/memory_buffer.h
+++ b/lib/rb/ext/memory_buffer.h
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information
diff --git a/lib/rb/ext/protocol.h b/lib/rb/ext/protocol.h
index 09eca76..5369530 100644
--- a/lib/rb/ext/protocol.h
+++ b/lib/rb/ext/protocol.h
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information
diff --git a/lib/rb/ext/struct.h b/lib/rb/ext/struct.h
index dfea6d5..37b1b35 100644
--- a/lib/rb/ext/struct.h
+++ b/lib/rb/ext/struct.h
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information