diff --git a/sys/kern/kern_et.c b/sys/kern/kern_et.c
index f64bef5f3128..544e6e476739 100644
--- a/sys/kern/kern_et.c
+++ b/sys/kern/kern_et.c
@@ -34,6 +34,8 @@ __FBSDID("$FreeBSD$");
 #include <sys/queue.h>
 #include <sys/timeet.h>
 
+#include "opt_timer.h"
+
 SLIST_HEAD(et_eventtimers_list, eventtimer);
 static struct et_eventtimers_list eventtimers = SLIST_HEAD_INITIALIZER(et_eventtimers);
 
@@ -121,7 +123,9 @@ void
 et_change_frequency(struct eventtimer *et, uint64_t newfreq)
 {
 
+#ifndef NO_EVENTTIMERS
 	cpu_et_frequency(et, newfreq);
+#endif
 }
 
 /*