diff --git a/bsp/stm32/stm32f429-atk-apollo/board/ports/sdcard_port.c b/bsp/stm32/stm32f429-atk-apollo/board/ports/sdcard_port.c
index 8779f4d489d4abd5e52b78b3e01456dd7bbc0e74..10d0655a3aa02ac106ff33f1ab3a9d4d36015c93 100644
--- a/bsp/stm32/stm32f429-atk-apollo/board/ports/sdcard_port.c
+++ b/bsp/stm32/stm32f429-atk-apollo/board/ports/sdcard_port.c
@@ -54,7 +54,7 @@ int stm32_sdcard_mount(void)
     else
     {
         LOG_E("create sd_mount thread err!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return RT_EOK;
 }