diff --git a/sys/pc98/cbus/clock.c b/sys/pc98/cbus/clock.c
index 22ed8a5f5c9..3028c074d15 100644
--- a/sys/pc98/cbus/clock.c
+++ b/sys/pc98/cbus/clock.c
@@ -93,7 +93,7 @@ TUNABLE_INT("hw.i8254.freq", &i8254_freq);
 int	i8254_max_count;
 static int i8254_real_max_count;
 
-static int lapic_allclocks;
+static int lapic_allclocks = 1;
 TUNABLE_INT("machdep.lapic_allclocks", &lapic_allclocks);
 
 static	struct mtx clock_lock;
diff --git a/sys/x86/isa/clock.c b/sys/x86/isa/clock.c
index 4a207090d62..83026d6c258 100644
--- a/sys/x86/isa/clock.c
+++ b/sys/x86/isa/clock.c
@@ -97,7 +97,7 @@ TUNABLE_INT("hw.i8254.freq", &i8254_freq);
 int	i8254_max_count;
 static int i8254_real_max_count;
 
-static int lapic_allclocks;
+static int lapic_allclocks = 1;
 TUNABLE_INT("machdep.lapic_allclocks", &lapic_allclocks);
 
 struct mtx clock_lock;