diff --git a/bin/ps/keyword.c b/bin/ps/keyword.c
index f7504cab5438..42cd59a6ba6f 100644
--- a/bin/ps/keyword.c
+++ b/bin/ps/keyword.c
@@ -60,13 +60,6 @@ __RCSID("$NetBSD: keyword.c,v 1.56 2018/04/11 18:52:05 christos Exp $");
 static VAR *findvar(const char *);
 static int  vcmp(const void *, const void *);
 
-#if 0 	/* kernel doesn't calculate these */
-	PUVAR("idrss", "IDRSS", 0, p_uru_idrss, UINT64, PRIu64),
-	PUVAR("isrss", "ISRSS", 0, p_uru_isrss, UINT64, PRId64),
-	PUVAR("ixrss", "IXRSS", 0, p_uru_ixrss, UINT64, PRId64),
-	PUVAR("maxrss", "MAXRSS", 0, p_uru_maxrss, UINT64, PRIu64),
-#endif
-
 /* Compute offset in common structures. */
 #define	POFF(x)	offsetof(struct kinfo_proc2, x)
 #define	LOFF(x)	offsetof(struct kinfo_lwp, x)
@@ -135,9 +128,12 @@ VAR var[] = {
 	VAR4("groups", "GROUPS", LJUST, groups),
 	/* holdcnt: unused, left for compat. */
 	LVAR("holdcnt", "HOLDCNT", 0, l_holdcnt, INT, "d"),
+	PUVAR("idrss", "IDRSS", 0, p_uru_idrss, UINT64, PRIu64),
 	VAR3("ignored", "sigignore", ALIAS),
 	PUVAR("inblk", "INBLK", 0, p_uru_inblock, UINT64, PRIu64),
 	VAR3("inblock", "inblk", ALIAS),
+	PUVAR("isrss", "ISRSS", 0, p_uru_isrss, UINT64, PRId64),
+	PUVAR("ixrss", "IXRSS", 0, p_uru_ixrss, UINT64, PRId64),
 	PVAR("jobc", "JOBC", 0, p_jobc, SHORT, "d"),
 	PVAR("ktrace", "KTRACE", 0, p_traceflag, INT, "x"),
 /*XXX*/	PVAR("ktracep", "KTRACEP", 0, p_tracep, KPTR, PRIx64),
@@ -151,6 +147,7 @@ VAR var[] = {
 	VAR4("lstate", "STAT", LJUST|LWP, lstate),
 	VAR6("ltime", "LTIME", LWP, lcputime, 0, CPUTIME),
 	PUVAR("majflt", "MAJFLT", 0, p_uru_majflt, UINT64, PRIu64),
+	PUVAR("maxrss", "MAXRSS", 0, p_uru_maxrss, UINT64, PRIu64),
 	PUVAR("minflt", "MINFLT", 0, p_uru_minflt, UINT64, PRIu64),
 	PUVAR("msgrcv", "MSGRCV", 0, p_uru_msgrcv, UINT64, PRIu64),
 	PUVAR("msgsnd", "MSGSND", 0, p_uru_msgsnd, UINT64, PRIu64),
diff --git a/bin/ps/ps.1 b/bin/ps/ps.1
index 635ec3b3f8d0..e022e82c30ea 100644
--- a/bin/ps/ps.1
+++ b/bin/ps/ps.1
@@ -29,7 +29,7 @@
 .\"
 .\"     @(#)ps.1	8.3 (Berkeley) 4/18/94
 .\"
-.Dd August 28, 2017
+.Dd August 6, 2019
 .Dt PS 1
 .Os
 .Sh NAME
@@ -316,6 +316,8 @@ The exact time the command started, using the
 .Dq \&%c
 format described in
 .Xr strftime 3 .
+.It Ar maxrss
+the maxiumum resident set size of the process (in 1024 byte units).
 .It Ar nice
 The process scheduling increment (see
 .Xr setpriority 2 ) .
@@ -513,6 +515,12 @@ group name (from gid)
 group names (from group access list)
 .It Ar groups
 group access list
+.It Ar idrss
+integral unshared data
+.It Ar isrss
+integral unshared stack
+.It Ar ixrss
+integral shared memory size
 .It Ar inblk
 total blocks read (alias
 .Ar inblock )
@@ -543,6 +551,8 @@ symbolic LWP state
 CPU time of the LWP
 .It Ar majflt
 total page faults
+.It Ar maxrss
+maximum resident set size
 .It Ar minflt
 total page reclaims
 .It Ar msgrcv