diff --git a/xyz/openbmc_project/Common.errors.yaml b/xyz/openbmc_project/Common.errors.yaml
index d365b35..288aa7c 100644
--- a/xyz/openbmc_project/Common.errors.yaml
+++ b/xyz/openbmc_project/Common.errors.yaml
@@ -14,3 +14,5 @@
   description: Too many resources have already been granted.
 - name: ResourceNotFound
   description: The resource is not found.
+- name: Unavailable
+  description: The service is temporarily unavailable.