diff --git a/chapters.ent b/chapters.ent
index a5efb7e68e..b973f89b04 100644
--- a/chapters.ent
+++ b/chapters.ent
@@ -30,11 +30,14 @@
 <!ENTITY reference.array             SYSTEM "functions/array.xml">
 <!ENTITY reference.aspell            SYSTEM "functions/aspell.xml">
 <!ENTITY reference.bc                SYSTEM "functions/bc.xml">
+<!ENTITY reference.com               SYSTEM "functions/com.xml">
 <!ENTITY reference.cpdf              SYSTEM "functions/cpdf.xml">
+<!ENTITY reference.cybercash         SYSTEM "functions/cybercash.xml">
 <!ENTITY reference.datetime          SYSTEM "functions/datetime.xml">
 <!ENTITY reference.dbase             SYSTEM "functions/dbase.xml">
 <!ENTITY reference.dba               SYSTEM "functions/dba.xml">
 <!ENTITY reference.dbm               SYSTEM "functions/dbm.xml">
+<!ENTITY reference.domxml            SYSTEM "functions/domxml.xml">
 <!ENTITY reference.calendar          SYSTEM "functions/calendar.xml">
 <!ENTITY reference.dir               SYSTEM "functions/dir.xml">
 <!ENTITY reference.dl                SYSTEM "functions/dl.xml">
@@ -43,6 +46,7 @@
 <!ENTITY reference.filepro           SYSTEM "functions/filepro.xml">
 <!ENTITY reference.filesystem        SYSTEM "functions/filesystem.xml">
 <!ENTITY reference.ftp               SYSTEM "functions/ftp.xml">
+<!ENTITY reference.gettext           SYSTEM "functions/gettext.xml">
 <!ENTITY reference.http              SYSTEM "functions/http.xml">
 <!ENTITY reference.hw                SYSTEM "functions/hw.xml">
 <!ENTITY reference.ibase             SYSTEM "functions/ibase.xml">