diff --git a/library/bootstrap-roles/deb-ubuntu-common/meta/main.yml b/library/bootstrap-roles/deb-ubuntu-common/meta/main.yml
index 053a8f7..a99ad2c 100644
--- a/library/bootstrap-roles/deb-ubuntu-common/meta/main.yml
+++ b/library/bootstrap-roles/deb-ubuntu-common/meta/main.yml
@@ -8,6 +8,6 @@ dependencies:
   - { role: '../../library/roles/data_disk', when: additional_disks is defined and additional_disks }
   - role: '../../library/roles/sshd_config'
   - { role: '../library/roles/letsencrypt-acme-sh-client', when: letsencrypt_acme_sh_install is defined and letsencrypt_acme_sh_install }
-  - { role: '../../library/roles/nagios', when: nagios_enabled is defined }
-  - { role: '../../library/roles/prometheus-node-exporter', when: prometheus_enabled }
+  - { role: '../../library/roles/nagios', when: nagios_enabled is defined and nagios_enabled }
+  - { role: '../../library/roles/prometheus-node-exporter', when: prometheus_enabled is defined and prometheus_enabled }