diff --git a/sys/kern/mutex.c b/sys/kern/mutex.c
index 84c8c94..cc8cbcd 100644
--- a/sys/kern/mutex.c
+++ b/sys/kern/mutex.c
@@ -95,6 +95,7 @@ Mutex_Unlock(Mutex *mtx)
 
     mtx->status = MTX_STATUS_UNLOCKED;
     mtx->owner = NULL;
+    WaitChannel_Wake(&mtx->chan);
     Spinlock_Unlock(&mtx->lock);
 
     return;