diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 17a96f5b079..ebbafdf6c92 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_sysctl.c,v 1.488 2026/04/15 19:29:02 deraadt Exp $	*/
+/*	$OpenBSD: kern_sysctl.c,v 1.489 2026/04/16 07:03:15 dgl Exp $	*/
 /*	$NetBSD: kern_sysctl.c,v 1.17 1996/05/20 17:49:05 mrg Exp $	*/
 
 /*-
@@ -2763,6 +2763,7 @@ sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep)
 					    dssize);
 				else
 					memset(&semsi->semids[i], 0, dssize);
+				semsi->semids[i].sem_base = NULL;
 				break;
 #endif
 #ifdef SYSVSHM
diff --git a/usr.bin/ipcs/ipcs.c b/usr.bin/ipcs/ipcs.c
index 72e077b2bdf..7721d4112a8 100644
--- a/usr.bin/ipcs/ipcs.c
+++ b/usr.bin/ipcs/ipcs.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ipcs.c,v 1.27 2019/06/28 13:35:01 deraadt Exp $	*/
+/*	$OpenBSD: ipcs.c,v 1.28 2026/04/16 07:03:15 dgl Exp $	*/
 /*	$NetBSD: ipcs.c,v 1.25 2000/06/16 03:58:20 simonb Exp $	*/
 
 /*-
@@ -630,7 +630,7 @@ sem_sysctl(void)
 		for (i = 0; i < semsi->seminfo.semmni; i++) {
 			struct semid_ds *semaptr = &semsi->semids[i];
 
-			if (semaptr->sem_base != NULL)
+			if (semaptr->sem_ctime != 0)
 				show_seminfo(semaptr->sem_otime,
 				    semaptr->sem_ctime,
 				    IXSEQ_TO_IPCID(i, semaptr->sem_perm),