diff --git a/conf/config.php b/conf/config.php
index 0628bfe..1ed7780 100644
--- a/conf/config.php
+++ b/conf/config.php
@@ -3,6 +3,9 @@
 # collectd version
 $CONFIG['version'] = 5;
 
+# show collectd 4 deprecation warning
+$CONFIG['version_warn'] = true;
+
 # collectd's datadir
 $CONFIG['datadir'] = '/var/lib/collectd/rrd';
 
diff --git a/inc/html.inc.php b/inc/html.inc.php
index b9d1727..7eef851 100644
--- a/inc/html.inc.php
+++ b/inc/html.inc.php
@@ -77,7 +77,7 @@ function html_start() {
 
 	}
 
-	if($CONFIG['version'] == 4) {
+	if($CONFIG['version'] == 4 && $CONFIG['version_warn']) {
 		echo <<<EOT
 <div class="warnheader">
 	You are using Collectd 4, which is deprecated by CGP. Graphs like