diff --git a/changelogs/fragments/180-default-values-doc.yml b/changelogs/fragments/180-default-values-doc.yml
new file mode 100644
index 0000000..cd2d858
--- /dev/null
+++ b/changelogs/fragments/180-default-values-doc.yml
@@ -0,0 +1,3 @@
+---
+trivial:
+  - add missing default values to docstrings (https://github.com/openshift/community.okd/pull/180).
diff --git a/plugins/modules/openshift_adm_groups_sync.py b/plugins/modules/openshift_adm_groups_sync.py
index 26fa2e2..0685f33 100644
--- a/plugins/modules/openshift_adm_groups_sync.py
+++ b/plugins/modules/openshift_adm_groups_sync.py
@@ -60,6 +60,7 @@ options:
     - The elements specified in this list will override the ones specified in C(allow_groups).
     type: list
     elements: str
+    default: []
   allow_groups:
     description:
     - Allowed groups, could be openshift group name or LDAP group dn value.
@@ -67,6 +68,7 @@ options:
       like I(cn=developers,ou=groups,ou=rfc2307,dc=ansible,dc=redhat).
     type: list
     elements: str
+    default: []
 
 requirements:
   - python >= 3.6
diff --git a/plugins/modules/openshift_build.py b/plugins/modules/openshift_build.py
index 08bedcf..2e84153 100644
--- a/plugins/modules/openshift_build.py
+++ b/plugins/modules/openshift_build.py
@@ -129,6 +129,7 @@ options:
       - New
       - Pending
       - Running
+    default: []
 
 requirements:
   - python >= 3.6