diff --git a/ChangeLog b/ChangeLog
index 945b2bd5..a6ae8ed5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -23185,3 +23185,6 @@
 2022-05-31 Fred Gleason <fredg@paravelsystems.com>
 	* Added an 'Ubuntu 22.04 LTS' section to 'DISTRO-SPECIFIC NOTES'
 	in 'INSTALL'.
+2022-06-01 Fred Gleason <fredg@paravelsystems.com>
+	* Added environmental variables to the 'Ubuntu 22.04 LTS' section to
+	'DISTRO-SPECIFIC NOTES'	in 'INSTALL'.
diff --git a/INSTALL b/INSTALL
index 7970970f..e41bb5a3 100644
--- a/INSTALL
+++ b/INSTALL
@@ -301,7 +301,9 @@ Required build packages: apache2 libexpat1-dev libexpat1 libid3-dev libcurl4-gnu
 
 Configure script invocation: ./configure --prefix=/usr --libdir=/usr/lib --libexecdir=/var/www/rd-bin --sysconfdir=/etc/apache2/conf-enabled --enable-rdxport-debug MUSICBRAINZ_LIBS="-ldiscid -lmusicbrainz5cc -lcoverartcc"
 
-Environmental variables: DOCBOOK_STYLESHEETS=/usr/share/xml/docbook/stylesheet/docbook-xsl
+Environmental variables:
+  DOCBOOK_STYLESHEETS=/usr/share/xml/docbook/stylesheet/docbook-xsl
+  DEBUILD_MAKE_ARGS=<optional-gcc-flags>
 
 Apache Web Server Configuration: CGI processing must be enabled. This can
 be done by means of the following commands: