diff --git a/ykval-munin-queuelength.php b/ykval-munin-queuelength.php
index abda118..5ecf7b1 100755
--- a/ykval-munin-queuelength.php
+++ b/ykval-munin-queuelength.php
@@ -53,8 +53,14 @@ $shortnames = array_map("url2shortname", $urls);
 
 if ($argc == 2 && strcmp($argv[1], "autoconf") == 0)
 {
-  print "yes\n";
-  exit(0);
+	if (is_array($urls) && count($urls) > 0)
+	{
+		echo "yes\n";
+		exit(0);
+	}
+
+	echo "no (sync pool not configured)\n";
+	exit(0);
 }
 
 if ($argc==2 && strcmp($argv[1], "config") == 0)