diff --git a/reactos/drivers/filters/mountmgr/device.c b/reactos/drivers/filters/mountmgr/device.c
index 3c32e628fd3..8e91493b01f 100644
--- a/reactos/drivers/filters/mountmgr/device.c
+++ b/reactos/drivers/filters/mountmgr/device.c
@@ -2788,6 +2788,9 @@ MountMgrDeviceControl(IN PDEVICE_OBJECT DeviceObject,
             Status = MountMgrSetAutoMount(DeviceExtension, Irp);
             break;
 
+        case IOCTL_MOUNTMGR_DEFINE_UNIX_DRIVE:
+        case IOCTL_MOUNTMGR_QUERY_UNIX_DRIVE:
+            DPRINT1("Winism! Rewrite the caller!\n");
         default:
             Status = STATUS_INVALID_DEVICE_REQUEST;
     }