diff --git a/roles/base/tasks/main.yml b/roles/base/tasks/main.yml
index 3c8ca56..8b4e84b 100644
--- a/roles/base/tasks/main.yml
+++ b/roles/base/tasks/main.yml
@@ -35,11 +35,11 @@
   - import_tasks: system_setup/openssh.yml
   - import_tasks: system_setup/scripts.yml
   - import_tasks: system_setup/disable_standby.yml
-    when: is_proxmox is set and is_proxmox == true
+    when: is_proxmox is defined and is_proxmox == true
   - import_tasks: software/wazuh-agent.yml
     when: ansible_distribution in ["Debian", "Pop!_OS", "Ubuntu", "Linux Mint", "Archlinux"]
   - import_tasks: system_setup/disable_standby.yml
-    when: is_proxmox is set and is_proxmox == true
+    when: is_proxmox is defined and is_proxmox == true
 
 
   # Set up the ansible environment