diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index 6d57425a9e06..7d6340cba411 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -431,7 +431,7 @@ mi_switch(int flags, struct thread *newtd)
 	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);
 #ifdef KDTRACE_HOOKS
-	if (__predict_false(sdt_probes_enabled) &&
+	if (SDT_PROBES_ENABLED() &&
 	    ((flags & SW_PREEMPT) != 0 || ((flags & SW_INVOL) != 0 &&
 	    (flags & SW_TYPE_MASK) == SWT_NEEDRESCHED)))
 		SDT_PROBE0(sched, , , preempt);
diff --git a/sys/sys/sdt.h b/sys/sys/sdt.h
index 424a0e3a0ded..1d27b1977604 100644
--- a/sys/sys/sdt.h
+++ b/sys/sys/sdt.h
@@ -164,8 +164,10 @@ SET_DECLARE(sdt_argtypes_set, struct sdt_argtype);
 #define SDT_PROBE_DECLARE(prov, mod, func, name)				\
 	extern struct sdt_probe sdt_##prov##_##mod##_##func##_##name[1]
 
+#define	SDT_PROBES_ENABLED()	__predict_false(sdt_probes_enabled)
+
 #define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)	do {	\
-	if (__predict_false(sdt_probes_enabled)) {				\
+	if (SDT_PROBES_ENABLED()) {						\
 		if (__predict_false(sdt_##prov##_##mod##_##func##_##name->id))	\
 		(*sdt_probe_func)(sdt_##prov##_##mod##_##func##_##name->id,	\
 		    (uintptr_t) arg0, (uintptr_t) arg1, (uintptr_t) arg2,	\