diff --git a/os_dep/linux/usb_intf.c b/os_dep/linux/usb_intf.c
index 2ef96b3..be0f654 100644
--- a/os_dep/linux/usb_intf.c
+++ b/os_dep/linux/usb_intf.c
@@ -1640,7 +1640,9 @@ static void __exit rtw_drv_halt(void)
 	rtw_mstat_dump(RTW_DBGDUMP);
 }
 
+#ifdef MODULE_IMPORT_NS
 MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);
+#endif
 
 module_init(rtw_drv_entry);
 module_exit(rtw_drv_halt);