diff --git a/component/os/os_dep/device_lock.c b/component/os/os_dep/device_lock.c
index 454042d1..7731e7b8 100644
--- a/component/os/os_dep/device_lock.c
+++ b/component/os/os_dep/device_lock.c
@@ -40,7 +40,7 @@ void device_mutex_free(RT_DEV_LOCK_E device)
 		_lock lock;
 		_irqL irqL;
 		rtw_enter_critical(&lock, &irqL);
-		if(!DEVICE_MUTEX_IS_INIT(device)){
+		if(DEVICE_MUTEX_IS_INIT(device)){
 			rtw_mutex_free(&device_mutex[device]);
 			DEVICE_MUTEX_CLR_INIT(device);
 		}