diff --git a/doc/src/sgml/docguide.sgml b/doc/src/sgml/docguide.sgml
index 599c8e62ea..fd72b3975a 100644
--- a/doc/src/sgml/docguide.sgml
+++ b/doc/src/sgml/docguide.sgml
@@ -213,7 +213,7 @@ brew install docbook docbook-xsl libxslt fop
 <programlisting>
 export XML_CATALOG_FILES=/usr/local/etc/xml/catalog
 </programlisting>
-    On Apple M1 based machines, use this:
+    On Apple Silicon based machines, use this:
 <programlisting>
 export XML_CATALOG_FILES=/opt/homebrew/etc/xml/catalog
 </programlisting>