diff --git a/roles/scrape-collectd/defaults/main.yml b/roles/scrape-collectd/defaults/main.yml
new file mode 100644
index 0000000..dcd0192
--- /dev/null
+++ b/roles/scrape-collectd/defaults/main.yml
@@ -0,0 +1 @@
+scrape_collectd_extra_targets: []
diff --git a/roles/scrape-collectd/vars/main.yml b/roles/scrape-collectd/vars/main.yml
index eaaa6e7..a06f673 100644
--- a/roles/scrape-collectd/vars/main.yml
+++ b/roles/scrape-collectd/vars/main.yml
@@ -1,2 +1,2 @@
 scrape_collectd_config:
-- targets: '{{ groups["collectd-prometheus"] }}'
+- targets: '{{ groups["collectd-prometheus"] + scrape_collectd_extra_targets }}'