diff --git a/config.sh.example b/config.sh.example
index 5ff758c..8c7da76 100644
--- a/config.sh.example
+++ b/config.sh.example
@@ -65,3 +65,6 @@
 
 # E-mail to use during the registration (default: <unset>)
 #CONTACT_EMAIL=
+
+# Lockfile location, to prevent concurrent access (default: $BASEDIR/lock)
+#LOCKFILE="${BASEDIR}/lock"