diff --git a/cpp.texi b/cpp.texi
index 7f5fc08..035cb62 100644
--- a/cpp.texi
+++ b/cpp.texi
@@ -1,8 +1,8 @@
 @c Copyright (C) 2022, 2023, 2025 Richard Stallman
 @c   and Free Software Foundation, Inc.
 
-This is part of the GNU C Intro and Reference Manual
-and covered by its license.
+@c This is part of the GNU C Intro and Reference Manual
+@c and covered by its license.
 
 @node Preprocessing
 @chapter Preprocessing
diff --git a/fp.texi b/fp.texi
index ce296a5..f86411e 100644
--- a/fp.texi
+++ b/fp.texi
@@ -2,8 +2,8 @@
 @c Copyright @copyright{} 2022, 2023, 2025 Richard Stallman
 @c   and Free Software Foundation, Inc.
 
-This is part of the GNU C Intro and Reference Manual
-and covered by its license.
+@c This is part of the GNU C Intro and Reference Manual
+@c and covered by its license.
 
 @node    Floating Point in Depth
 @chapter Floating Point in Depth