diff --git a/tasks/preflight.yml b/tasks/preflight.yml
index 4587982..92e5daa 100644
--- a/tasks/preflight.yml
+++ b/tasks/preflight.yml
@@ -2,5 +2,5 @@
 - name: check collectors
   fail:
     msg: "Collector cannot be both disabled and enabled"
-  when: '"{{ item }}" in "{{ node_exporter_enabled_collectors }}"'
+  when: item in node_exporter_enabled_collectors
   with_items: "{{ node_exporter_disabled_collectors }}"