diff --git a/acronyms.tex b/acronyms.tex
index 3b0eeaa..0ab561e 100644
--- a/acronyms.tex
+++ b/acronyms.tex
@@ -79,6 +79,7 @@
 \newacronym{ip6}{IPv6}{Internet Protocol version 6}
 \newacronym{ipv4}{IPv4}{Internet Protocol version 4}
 \newacronym{ipv6}{IPv6}{Internet Protocol version 6}
+\newacronym{ipx}{IPX}{Internetwork Packet Exchange}
 \newacronym{irc}{IRC}{Internet Relay Chat}
 \newacronym{irtf}{IRTF}{Internet Research Task Force}
 \newacronym{isis}{IS-IS}{Intermediate System to Intermediate System}