diff --git a/components/drivers/sdio/mmcsd_core.c b/components/drivers/sdio/mmcsd_core.c
index 2466ce627d..a93d9329fb 100644
--- a/components/drivers/sdio/mmcsd_core.c
+++ b/components/drivers/sdio/mmcsd_core.c
@@ -749,7 +749,8 @@ int rt_mmcsd_core_init(void)
     }
 
     rt_sdio_init();
-}
 
+	return 0;
+}
 INIT_PREV_EXPORT(rt_mmcsd_core_init);