diff --git a/oslo/vmware/exceptions.py b/oslo/vmware/exceptions.py
index 3590d51..875bd22 100644
--- a/oslo/vmware/exceptions.py
+++ b/oslo/vmware/exceptions.py
@@ -31,6 +31,7 @@ FILE_ALREADY_EXISTS = 'FileAlreadyExists'
 FILE_FAULT = 'FileFault'
 FILE_LOCKED = 'FileLocked'
 FILE_NOT_FOUND = 'FileNotFound'
+INVALID_POWER_STATE = 'InvalidPowerState'
 INVALID_PROPERTY = 'InvalidProperty'
 NO_PERMISSION = 'NoPermission'
 NOT_AUTHENTICATED = 'NotAuthenticated'
@@ -168,6 +169,11 @@ class FileNotFoundException(VMwareDriverException):
     code = 404
 
 
+class InvalidPowerStateException(VMwareDriverException):
+    msg_fmt = _("Invalid power state.")
+    code = 409
+
+
 class InvalidPropertyException(VMwareDriverException):
     msg_fmt = _("Invalid property.")
     code = 400
@@ -192,6 +198,7 @@ _fault_classes_registry = {
     FILE_FAULT: FileFaultException,
     FILE_LOCKED: FileLockedException,
     FILE_NOT_FOUND: FileNotFoundException,
+    INVALID_POWER_STATE: InvalidPowerStateException,
     INVALID_PROPERTY: InvalidPropertyException,
     NO_PERMISSION: NoPermissionException,
     NOT_AUTHENTICATED: NotAuthenticatedException,