diff --git a/include/limits.h b/include/limits.h
index ec18dd7127..28f02c4254 100644
--- a/include/limits.h
+++ b/include/limits.h
@@ -276,10 +276,10 @@
 #define NL_TEXTMAX _POSIX2_LINE_MAX
 
 /* NZERO
- *   Default process priority. Minimum Acceptable Value: 20
+ *   Default process priority. Minimum Acceptable Value: 128
  */
 
-#define NZERO 20
+#define NZERO 128
 
 /* Required for asynchronous I/O */
 
diff --git a/libs/libc/unistd/lib_getpriority.c b/libs/libc/unistd/lib_getpriority.c
index 95996d2313..44d9c8d8ed 100644
--- a/libs/libc/unistd/lib_getpriority.c
+++ b/libs/libc/unistd/lib_getpriority.c
@@ -82,5 +82,9 @@ int getpriority(int which, id_t who)
       return ret;
     }
 
-  return param.sched_priority;
+  /* Since -1 is a legal return value, clear errno to avoid the chaos */
+
+  set_errno(0);
+
+  return NZERO - param.sched_priority;
 }
diff --git a/libs/libc/unistd/lib_setpriority.c b/libs/libc/unistd/lib_setpriority.c
index 057f05fa73..d02c7af41e 100644
--- a/libs/libc/unistd/lib_setpriority.c
+++ b/libs/libc/unistd/lib_setpriority.c
@@ -69,7 +69,7 @@ int setpriority(int which, id_t who, int value)
       return ret;
     }
 
-  param.sched_priority = value;
+  param.sched_priority = NZERO - value;
 
   return sched_setparam(who, &param);
 }