--- a/sysdeps/mach/hurd/setpriority.c.orig	2016-02-18 18:54:00.000000000 +0100
+++ b/sysdeps/mach/hurd/setpriority.c		2016-08-31 10:05:20.000000000 +0200
@@ -54,7 +54,7 @@
 				    0, 1);
 	  }
 #else
-	  prierr = __task_priority (task, NICE_TO_MACH_PRIORITY (prio), 1);
+	  prierr = __task_priority (task, NICE_TO_MACH_PRIORITY (prio), 0);
 #endif
 	  __mach_port_deallocate (__mach_task_self (), task);
 	  switch (prierr)