diff --git a/components/drivers/misc/adc.c b/components/drivers/misc/adc.c
index f5d7d52c044..43a9750349a 100644
--- a/components/drivers/misc/adc.c
+++ b/components/drivers/misc/adc.c
@@ -43,16 +43,15 @@ static rt_ssize_t _adc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size
 static rt_err_t _adc_control(rt_device_t dev, int cmd, void *args)
 {
     rt_adc_device_t adc = (struct rt_adc_device *)dev;
-    rt_err_t        result;
-
+    rt_err_t        result = RT_ERROR;
 
     if (cmd == RT_ADC_CMD_ENABLE && adc->ops->enabled)
     {
-        result = adc->ops->enabled(adc, (rt_uint32_t)args, RT_TRUE);
+        result = adc->ops->enabled(adc, (rt_int8_t)(rt_base_t)args, RT_TRUE);
     }
     else if (cmd == RT_ADC_CMD_DISABLE && adc->ops->enabled)
     {
-        result = adc->ops->enabled(adc, (rt_uint32_t)args, RT_FALSE);
+        result = adc->ops->enabled(adc, (rt_int8_t)(rt_base_t)args, RT_FALSE);
     }
     else if (cmd == RT_ADC_CMD_GET_RESOLUTION && adc->ops->get_resolution && args)
     {