diff --git a/lookup_plugins/re2oapi.py b/lookup_plugins/re2oapi.py
index cfcc2757..044b630d 100644
--- a/lookup_plugins/re2oapi.py
+++ b/lookup_plugins/re2oapi.py
@@ -527,8 +527,8 @@ class LookupModule(LookupBase):
         if (api_username is None and api_password is None
                 and self._use_cpasswords):
             display.vvv("Using cpasswords vault to get API credentials.")
-            api_username = variables.get('vault_re2o_service_user')
-            api_password = variables.get('vault_re2o_service_password')
+            api_username = variables.get('vault', {}).get('re2o_service_user')
+            api_password = variables.get('vault', {}).get('re2o_service_password')
 
         if api_username is None:
             raise AnsibleError(to_native(