diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index ba133b52afb3..19c9e17ce1e8 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -430,7 +430,11 @@ mi_switch(int flags, struct thread *newtd)
 	PCPU_SET(switchticks, ticks);
 	CTR4(KTR_PROC, "mi_switch: old thread %ld (td_sched %p, pid %ld, %s)",
 	    td->td_tid, td_get_sched(td), td->td_proc->p_pid, td->td_name);
-	SDT_PROBE0(sched, , , preempt);
+#ifdef KDTRACE_HOOKS
+	if ((flags & SW_PREEMPT) != 0 || ((flags & SW_INVOL) != 0 &&
+	    (flags & SW_TYPE_MASK) == SWT_NEEDRESCHED))
+		SDT_PROBE0(sched, , , preempt);
+#endif
 	sched_switch(td, newtd, flags);
 	CTR4(KTR_PROC, "mi_switch: new thread %ld (td_sched %p, pid %ld, %s)",
 	    td->td_tid, td_get_sched(td), td->td_proc->p_pid, td->td_name);