diff --git a/roles/prometheus_node/tasks/main.yml b/roles/prometheus_node/tasks/main.yml
index d21f59b..10f984c 100644
--- a/roles/prometheus_node/tasks/main.yml
+++ b/roles/prometheus_node/tasks/main.yml
@@ -1,7 +1,7 @@
 ---
 
 - name: include os specific vars
-  include_vars: "{{ lookup('ansible.builtin.first_found', paths=['vars'], files=files)"
+  include_vars: "{{ lookup('ansible.builtin.first_found', paths=['vars'], files=files) }}"
   vars:
     files:
       - "{% if 'id' in ansible_lsb %}{{ ansible_lsb.id }}{% else %}{{ ansible_distribution }}{% endif %}_{% if 'major_release' in ansible_lsb %}{{ ansible_lsb.major_release }}{% else %}{{ ansible_distribution_version }}{% endif %}.yml"