diff --git a/xep.ent b/xep.ent
index 0ff05482..cd5e0c03 100644
--- a/xep.ent
+++ b/xep.ent
@@ -416,6 +416,7 @@ THE SOFTWARE.
 <!ENTITY rfc2144 "<span class='ref'><link url='http://tools.ietf.org/html/rfc2144'>RFC 2144</link></span> <note>RFC 2144: The CAST-128 Encryption Algorithm &lt;<link url='http://tools.ietf.org/html/rfc2144'>http://tools.ietf.org/html/rfc2144</link>&gt;.</note>" >
 <!ENTITY rfc2183 "<span class='ref'><link url='http://tools.ietf.org/html/rfc2183'>RFC 2183</link></span> <note>RFC 2183: Communicating Presentation Information in Internet Messages: The Content-Disposition Header Field &lt;<link url='http://tools.ietf.org/html/rfc2183'>http://tools.ietf.org/html/rfc2183</link>&gt;.</note>" >
 <!ENTITY rfc2222 "<span class='ref'><link url='http://tools.ietf.org/html/rfc2222'>RFC 2222</link></span> <note>RFC 2222: Simple Authentication and Security Layer (SASL) &lt;<link url='http://tools.ietf.org/html/rfc2222'>http://tools.ietf.org/html/rfc2222</link>&gt;.</note>" >
+<!ENTITY rfc2244 "<span class='ref'><link url='http://tools.ietf.org/html/rfc2244'>RFC 2244</link></span> <note>RFC 2244: ACAP -- Application Configuration Access Protocol &lt;<link url='http://tools.ietf.org/html/rfc2244'>http://tools.ietf.org/html/rfc2244</link>&gt;.</note>" >
 <!ENTITY rfc2251 "<span class='ref'><link url='http://tools.ietf.org/html/rfc2251'>RFC 2251</link></span> <note>RFC 2251: Lightweight Directory Access Protocol (v3) &lt;<link url='http://tools.ietf.org/html/rfc2251'>http://tools.ietf.org/html/rfc2251</link>&gt;.</note>" >
 <!ENTITY rfc2252 "<span class='ref'><link url='http://tools.ietf.org/html/rfc2252'>RFC 2252</link></span> <note>RFC 2252: Lightweight Directory Access Protocol (v3): Attribute Syntax Definitions &lt;<link url='http://tools.ietf.org/html/rfc2252'>http://tools.ietf.org/html/rfc2252</link>&gt;.</note>" >
 <!ENTITY rfc2253 "<span class='ref'><link url='http://tools.ietf.org/html/rfc2253'>RFC 2253</link></span> <note>RFC 2253: Lightweight Directory Access Protocol (v3): UTF-8 String Representation of Distinguished Names &lt;<link url='http://tools.ietf.org/html/rfc2253'>http://tools.ietf.org/html/rfc2253</link>&gt;.</note>" >