diff --git a/libc/bionic/pthread.c b/libc/bionic/pthread.c
index ec3c459..d2c81a3 100644
--- a/libc/bionic/pthread.c
+++ b/libc/bionic/pthread.c
@@ -1215,22 +1215,12 @@
                             pthread_mutex_t * mutex,
                             unsigned msecs)
 {
-    int oldvalue;
     struct timespec ts;
-    int status;
 
     ts.tv_sec = msecs / 1000;
     ts.tv_nsec = (msecs % 1000) * 1000000;
 
-    oldvalue = cond->value;
-
-    pthread_mutex_unlock(mutex);
-    status = __futex_wait(&cond->value, oldvalue, &ts);
-    pthread_mutex_lock(mutex);
-
-    if(status == (-ETIMEDOUT)) return ETIMEDOUT;
-
-    return 0;
+    return __pthread_cond_timedwait_relative(cond, mutex, &ts);
 }