diff --git a/miosix/kernel/pthread_private.h b/miosix/kernel/pthread_private.h
index 4814ee56c58d79a3333e2eb6c643e57534e2a24f..51fe7b147ddf91c706fe457fba8c21e01b5d86e0 100644
--- a/miosix/kernel/pthread_private.h
+++ b/miosix/kernel/pthread_private.h
@@ -202,6 +202,4 @@ static inline unsigned int IRQdoMutexUnlockAllDepthLevels(pthread_mutex_t *mutex
     return result;
 }
 
-int pthreadCondTimedWaitImpl(pthread_cond_t *cond, pthread_mutex_t *mutex, long long absTime);
-
 } //namespace miosix