diff --git a/bsp/nxp/imx/imx6ull-smart/drivers/drv_wdt.c b/bsp/nxp/imx/imx6ull-smart/drivers/drv_wdt.c
index ec11dbdc75..f61cc84fac 100644
--- a/bsp/nxp/imx/imx6ull-smart/drivers/drv_wdt.c
+++ b/bsp/nxp/imx/imx6ull-smart/drivers/drv_wdt.c
@@ -168,7 +168,7 @@ static rt_err_t imx6ull_wdog_control(watchdog_t *wdt, int cmd, void *args)
         }
         break;
         default:
-            return RT_ERROR;
+            return -RT_ERROR;
     }
 
     return RT_EOK;