diff --git a/inventories/group_vars/all/release_vector.yaml b/inventories/group_vars/all/release_vector.yaml
index 53d8d24c..0fba64d3 100644
--- a/inventories/group_vars/all/release_vector.yaml
+++ b/inventories/group_vars/all/release_vector.yaml
@@ -38,7 +38,7 @@ metal_stack_release_vectors:
 ##
 
 # ansible_common_version:
-# metal_roles_version:
+# metal_roles_version: pr-<pr-number-and-title>
 # metal_ansible_modules_version:
 
 ##