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-rw-r--r--hurd/hurd/resource.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/hurd/hurd/resource.h b/hurd/hurd/resource.h
index e43d8e8b74..e9931e528a 100644
--- a/hurd/hurd/resource.h
+++ b/hurd/hurd/resource.h
@@ -42,8 +42,8 @@ extern error_t _hurd_priority_which_map (enum __priority_which which, int who,
 
 /* Convert between Mach priority values and the priority
    values used by getpriority, setpriority, and nice.  */
-#define MACH_PRIORITY_TO_NICE(prio) (2 * ((prio) - 12))
-#define NICE_TO_MACH_PRIORITY(nice) (12 + ((nice) / 2))
+#define MACH_PRIORITY_TO_NICE(prio) ((prio) - 25)
+#define NICE_TO_MACH_PRIORITY(nice) ((nice) + 25)