diff --git a/bsp/stm32_radio/startup.c b/bsp/stm32_radio/startup.c
index fe82f6aba0..e220adfd1d 100644
--- a/bsp/stm32_radio/startup.c
+++ b/bsp/stm32_radio/startup.c
@@ -106,8 +106,7 @@ void rtthread_startup(void)
 
     codec_hw_init();
 
-    /* init hardware serial device */
-    rt_hw_usart_init();
+    /* init hardware device */
 #ifdef RT_USING_DFS
     GPIO_ResetBits(GPIOC,GPIO_Pin_6);
     rt_hw_sdcard_init();