--- a/mime-ui-en.texi
+++ b/mime-ui-en.texi
@@ -14,6 +14,11 @@
 @author Kazuhiro Ito
 @subtitle 2020/09/17
 @end titlepage
+@dircategory GNU Emacs Lisp
+@direntry
+* Semi-en: (mime-ui-en).  MIME user interface for GNU Emacs.
+@end direntry
+
 @node Top, Introduction, (dir), (dir)
 @top SEMI-EPG 1.14 Manual
 
--- a/mime-ui-ja.texi
+++ b/mime-ui-ja.texi
@@ -15,6 +15,11 @@
 @author 伊藤 和博
 @subtitle 2020/09/17
 @end titlepage
+@dircategory GNU Emacs Lisp
+@direntry
+* Semi-ja: (mime-ui-ja).  MIME user interface for GNU Emacs.
+@end direntry
+
 @node Top, Introduction, (dir), (dir)
 @top SEMI-EPG 1.14 説明書