diff --git a/reactos/drivers/bus/acpi/cmbatt/cmbpnp.c b/reactos/drivers/bus/acpi/cmbatt/cmbpnp.c
index 55d3ae63d49..bbeee7960d8 100644
--- a/reactos/drivers/bus/acpi/cmbatt/cmbpnp.c
+++ b/reactos/drivers/bus/acpi/cmbatt/cmbpnp.c
@@ -567,8 +567,7 @@ CmBattCreateFdo(IN PDRIVER_OBJECT DriverObject,
     }
     
     /* Set FDO flags */
-    FdoDeviceObject->Flags |= DO_BUFFERED_IO;
-    FdoDeviceObject->Flags |= DO_MAP_IO_BUFFER;
+    FdoDeviceObject->Flags |= (DO_POWER_PAGABLE | DO_BUFFERED_IO);
     FdoDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
 
     /* Initialize the extension */