Index: head/bin/ps/print.c
===================================================================
--- head/bin/ps/print.c
+++ head/bin/ps/print.c
@@ -704,17 +704,17 @@
 	class = lpri->pri_class;
 	level = lpri->pri_level;
 	switch (class) {
-	case PRI_ITHD:
-		asprintf(&str, "intr:%u", level);
+	case RTP_PRIO_REALTIME:
+	/* alias for PRI_REALTIME */
+		asprintf(&str, "real:%u", level - PRI_MIN_REALTIME);
 		break;
-	case PRI_REALTIME:
-		asprintf(&str, "real:%u", level);
+	case RTP_PRIO_NORMAL:
+	/* alias for PRI_TIMESHARE */
+		asprintf(&str, "normal:%u", level - PRI_MIN_TIMESHARE);
 		break;
-	case PRI_TIMESHARE:
-		asprintf(&str, "normal");
-		break;
-	case PRI_IDLE:
-		asprintf(&str, "idle:%u", level);
+	case RTP_PRIO_IDLE:
+	/* alias for PRI_IDLE */
+		asprintf(&str, "idle:%u", level - PRI_MIN_IDLE);
 		break;
 	default:
 		asprintf(&str, "%u:%u", class, level);
Index: head/bin/ps/ps.1
===================================================================
--- head/bin/ps/ps.1
+++ head/bin/ps/ps.1
@@ -648,7 +648,8 @@
 .It Cm rss
 resident set size
 .It Cm rtprio
-realtime priority (101 = not a realtime process)
+realtime priority (see
+.Xr rtprio 1)
 .It Cm ruid
 real user ID
 .It Cm ruser