diff --git a/config/vufind/config.ini b/config/vufind/config.ini
index 1575d5d6933f1c35397da68c2487e35de48a245d..8cf02b9dfb56aa4d36959225384064b7becdb4bc 100644
--- a/config/vufind/config.ini
+++ b/config/vufind/config.ini
@@ -1142,7 +1142,10 @@ treeSearchLimit = 100
 ;universal = false
 
 ; Uncomment this section and provide your Piwik server address and site id to
-; enable Piwik analytics.
+; enable Piwik analytics. Note: VuFind's Piwik integration uses several custom
+; variables; to take advantage of them, you must reconfigure Piwik by switching
+; to its root directory and running this command to raise a default limit:
+; ./console customvariables:set-max-custom-variables 10
 [Piwik]
 ;url = "http://server.address/piwik/"
 ;site_id = 1