diff --git a/yaml/xyz/openbmc_project/State/BMC.interface.yaml b/yaml/xyz/openbmc_project/State/BMC.interface.yaml
index d25e573..ff1a228 100644
--- a/yaml/xyz/openbmc_project/State/BMC.interface.yaml
+++ b/yaml/xyz/openbmc_project/State/BMC.interface.yaml
@@ -10,6 +10,8 @@
       default: "None"
       description: >
           The desired BMC transition
+      errors:
+          - xyz.openbmc_project.Common.Error.Unavailable
 
     - name: CurrentBMCState
       type: enum[self.BMCState]
diff --git a/yaml/xyz/openbmc_project/State/Chassis.interface.yaml b/yaml/xyz/openbmc_project/State/Chassis.interface.yaml
index e368952..9121fd4 100644
--- a/yaml/xyz/openbmc_project/State/Chassis.interface.yaml
+++ b/yaml/xyz/openbmc_project/State/Chassis.interface.yaml
@@ -9,6 +9,7 @@
           preserved across AC power cycles of the BMC.
       errors:
           - xyz.openbmc_project.State.Chassis.Error.BMCNotReady
+          - xyz.openbmc_project.Common.Error.Unavailable
 
     - name: CurrentPowerState
       type: enum[self.PowerState]
diff --git a/yaml/xyz/openbmc_project/State/Host.interface.yaml b/yaml/xyz/openbmc_project/State/Host.interface.yaml
index 95f3b19..bd73482 100644
--- a/yaml/xyz/openbmc_project/State/Host.interface.yaml
+++ b/yaml/xyz/openbmc_project/State/Host.interface.yaml
@@ -11,6 +11,7 @@
       errors:
           - xyz.openbmc_project.State.Host.Error.BMCNotReady
           - xyz.openbmc_project.Common.Error.NotAllowed
+          - xyz.openbmc_project.Common.Error.Unavailable
 
     - name: AllowedHostTransitions
       type: set[enum[self.Transition]]