--- a/pthread_key_delete.c
+++ b/pthread_key_delete.c
@@ -119,7 +119,7 @@
 	  /* A thread could be holding the keyLock */
 	  while (EBUSY == pthread_mutex_destroy (&(key->keyLock)))
 	    {
-	      Sleep(1); // Ugly.
+	      Sleep(0); /* Ugly */
 	    }
 	}