diff --git a/roles/install_agent/vars/main.yml b/roles/install_agent/vars/main.yml
index b73ff5c..149b780 100644
--- a/roles/install_agent/vars/main.yml
+++ b/roles/install_agent/vars/main.yml
@@ -1,9 +1,9 @@
 ---
 # vars file for install_agent
-pkg_format: "{% if ansible_facts.pkg_mgr in ['yum', 'dnf', 'zypper'] %}rpm{%
-  elif ansible_facts.pkg_mgr == 'apt' %}deb{%
-  elif ansible_facts.os_family == 'Windows' and not win_use_exe %}msi{%
-  elif ansible_facts.os_family == 'Windows' and win_use_exe %}exe{%
+pkg_format: "{% if ansible_facts.pkg_mgr | default([]) in ['yum', 'dnf', 'zypper'] %}rpm{%
+  elif ansible_facts.pkg_mgr | default('') == 'apt' %}deb{%
+  elif ansible_facts.os_family | default('') == 'Windows' and not win_use_exe %}msi{%
+  elif ansible_facts.os_family | default('') == 'Windows' and win_use_exe %}exe{%
   else %}unknown{% endif %}"
 pkg_arch: "{% if ansible_facts.architecture | regex_search('x86_64|64-bit') %}64_bit{%
   elif ansible_facts.architecture | regex_search('i386|32-bit') %}32_bit{%