diff --git a/tasks/main.yml b/tasks/main.yml
index afd44a2..53b9573 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -34,7 +34,7 @@
     mode: "0755"
     owner: root
     group: root
-  when: ("docker" in ansible_facts.getent_group) and ansible_os_family == "Debian"
+  when: '"docker" in ansible_facts.getent_group and ansible_os_family == "Debian"'
 
 #######################################
 - name: copy check_mount.sh file to /lib/nagios/plugins (Debian based distros)