diff --git a/include/ruby/subst.h b/include/ruby/subst.h
index cf48a3909c..d7b9a63050 100644
--- a/include/ruby/subst.h
+++ b/include/ruby/subst.h
@@ -1,7 +1,6 @@
 #ifndef RUBY_SUBST_H                                 /*-*-C++-*-vi:se ft=cpp:*/
 #define RUBY_SUBST_H 1
 /**
- * @file
  * @author     Ruby developers <ruby-core@ruby-lang.org>
  * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
  *             Permission  is hereby  granted,  to  either redistribute  and/or