diff --git a/src/sys/kernel/ubthread.c b/src/sys/kernel/ubthread.c
index 0eba717..69abd19 100644
--- a/src/sys/kernel/ubthread.c
+++ b/src/sys/kernel/ubthread.c
@@ -123,11 +123,15 @@
   ubthread_cond_t  ubcond  = *cond;
   ubthread_mutex_t ubmutex = *mutex;
   uInt32 enterTime = systemVitals->sysUptime+20;
+  atomic_exchange(&ubmutex->lock, false);
+  kprintf("timedwait!");
   while (enterTime > systemVitals->sysUptime) {
     if (ubcond->lock == false) break;
     sched_yield();
     }
-  atomic_exchange(&ubmutex->lock, false);
+  //atomic_exchange(&ubmutex->lock, false);
+  atomic_exchange(&ubmutex->lock, true);
+  kprintf("timedwait END!");
   //ubmutex->locked = UNLOCKED;
   return(0x0);
   }