diff --git a/setup/bootstrap.sh b/setup/bootstrap.sh
index f46e5f1f..90b43ce2 100644
--- a/setup/bootstrap.sh
+++ b/setup/bootstrap.sh
@@ -14,9 +14,10 @@ if [ -z "$TAG" ]; then
 	# in part because an upgrade is required before jumping to Ubuntu 18.04.
 	# New users on Ubuntu 18 need to get the latest version number too.
 	#
-	# Also, the system status checks read this script for TAG= to get
-	# the latest version, so the first TAG= line must be the one that
-	# we want to display in status checks.
+	# Also, the system status checks read this script for TAG = to get
+	# (without the space, but if we put it in a comment it would confuse
+	# the status checks!) the latest version, so the first such line must
+	# be the one that we want to display in status checks.
 	if [ "`lsb_release -d | sed 's/.*:\s*//' | sed 's/18\.04\.[0-9]/18.04/' `" == "Ubuntu 18.04 LTS" ]; then
 		# This machine is running Ubuntu 18.04.
 		TAG=v0.30