diff --git a/plugins/mail/mailman-queue-check b/plugins/mail/mailman-queue-check
index 8240a71c..4c75c792 100755
--- a/plugins/mail/mailman-queue-check
+++ b/plugins/mail/mailman-queue-check
@@ -17,6 +17,7 @@
 
 if [ "$1" = "config" ]; then
   echo "graph_title Mailman Queue"
+  echo "graph_category mailman"
   echo "graph_args --base 1000 -l 0"
   echo "archive.label Archive"
   echo "archive.draw LINE2"