diff --git a/acronyms.tex b/acronyms.tex
index 2722a34..8564b13 100644
--- a/acronyms.tex
+++ b/acronyms.tex
@@ -85,6 +85,7 @@
 \newacronym{irtf}{IRTF}{Internet Research Task Force}
 \newacronym{isis}{IS-IS}{Intermediate System to Intermediate System}
 \newacronym{isl}{ISL}{}
+\newacronym{iso}{ISO}{International Organization for Standardization}
 \newacronym{isoc}{ISoc}{Internet Society}
 \newacronym{isp}{ISP}{Internet Service Provider}
 \newacronym{ixp}{IXP}{Internet Exchange Point}