diff --git a/doc/formats/html/Doxyfile b/doc/formats/html/Doxyfile
index f9a62f4e0..730158773 100644
--- a/doc/formats/html/Doxyfile
+++ b/doc/formats/html/Doxyfile
@@ -790,7 +790,7 @@ WARN_LOGFILE           = doxygen_warnings
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ../ ./mainpage.dox
+INPUT                  = ./mainpage.dox ./dox_comments/header_files/
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses