diff --git a/sys/kern/sched_ule.c b/sys/kern/sched_ule.c
index a4d0a040297e..c6889ccd9332 100644
--- a/sys/kern/sched_ule.c
+++ b/sys/kern/sched_ule.c
@@ -2939,7 +2939,7 @@ SYSCTL_INT(_kern_sched, OID_AUTO, steal_idle, CTLFLAG_RW, &steal_idle, 0,
 SYSCTL_INT(_kern_sched, OID_AUTO, steal_thresh, CTLFLAG_RW, &steal_thresh, 0,
     "Minimum load on remote CPU before we'll steal");
 SYSCTL_PROC(_kern_sched, OID_AUTO, topology_spec, CTLTYPE_STRING |
-    CTLFLAG_RD, NULL, 0, sysctl_kern_sched_topology_spec, "A",
+    CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_kern_sched_topology_spec, "A",
     "XML dump of detected CPU topology");
 #endif
 
diff --git a/sys/kern/subr_smp.c b/sys/kern/subr_smp.c
index 81e11ee70e73..108705c98a25 100644
--- a/sys/kern/subr_smp.c
+++ b/sys/kern/subr_smp.c
@@ -84,8 +84,9 @@ SYSCTL_INT(_kern_smp, OID_AUTO, maxid, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxid, 0,
 SYSCTL_INT(_kern_smp, OID_AUTO, maxcpus, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxcpus,
     0, "Max number of CPUs that the system was compiled for.");
 
-SYSCTL_PROC(_kern_smp, OID_AUTO, active, CTLFLAG_RD | CTLTYPE_INT, NULL, 0,
-    sysctl_kern_smp_active, "I", "Indicates system is running in SMP mode");
+SYSCTL_PROC(_kern_smp, OID_AUTO, active, CTLFLAG_RD|CTLTYPE_INT|CTLFLAG_MPSAFE,
+    NULL, 0, sysctl_kern_smp_active, "I",
+    "Indicates system is running in SMP mode");
 
 int smp_disabled = 0;	/* has smp been disabled? */
 SYSCTL_INT(_kern_smp, OID_AUTO, disabled, CTLFLAG_RDTUN|CTLFLAG_CAPRD,