diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c b/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
index abcffa7288b4082840ed7e35c629f9937c565b19..ec9bf701ed7ada4ba8c87640cf3846a26af89566 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
@@ -396,7 +396,7 @@ static rt_err_t drv_pwm_control(struct rt_device_pwm *device, int cmd, void *arg
     case PWM_CMD_GET:
         return drv_pwm_get(htim, configuration);
     default:
-        return RT_EINVAL;
+        return -RT_EINVAL;
     }
 }