diff --git a/doc/sgml/oper-guide/charybdis-oper-guide.sgml b/doc/sgml/oper-guide/charybdis-oper-guide.sgml
index 6dd8a17..2c9c1a9 100644
--- a/doc/sgml/oper-guide/charybdis-oper-guide.sgml
+++ b/doc/sgml/oper-guide/charybdis-oper-guide.sgml
@@ -5,7 +5,6 @@
 <!ENTITY cmodes SYSTEM "cmodes.sgml">
 <!ENTITY ucommands SYSTEM "ucommands.sgml">
 <!ENTITY commands SYSTEM "commands.sgml">
-<!ENTITY extensions SYSTEM "extensions.sgml">
 <!ENTITY config SYSTEM "config.sgml">
 ]>
 <book id="charybdis-oper-guide">
@@ -38,7 +37,6 @@
   &cmodes;
   &ucommands;
   &commands;
-  &extensions;
   &oprivs;
   &config;
 </book>