diff --git a/sys/arm64/arm64/mp_machdep.c b/sys/arm64/arm64/mp_machdep.c
--- a/sys/arm64/arm64/mp_machdep.c
+++ b/sys/arm64/arm64/mp_machdep.c
@@ -147,7 +147,7 @@
 static volatile int aps_ready;
 
 /* Temporary variables for init_secondary()  */
-static void *dpcpu[MAXCPU - 1];
+static void **dpcpu;
 
 static bool
 is_boot_cpu(uint64_t target_cpu)
@@ -320,6 +320,7 @@
 			kmem_free(bootstacks[cpu - 1], MP_BOOTSTACK_SIZE);
 	}
 	kmem_free(bootstacks, mp_maxid * sizeof(*bootstacks));
+	kmem_free(dpcpu, mp_maxid * sizeof(*dpcpu));
 }
 SYSINIT(smp_after_idle_runnable, SI_SUB_SMP, SI_ORDER_ANY,
     smp_after_idle_runnable, NULL);
@@ -781,6 +782,7 @@
 	 * we need an array suze of mp_maxid.
 	 */
 	bootstacks = kmem_malloc(mp_maxid * sizeof(*bootstacks), M_WAITOK);
+	dpcpu = kmem_malloc(mp_maxid * sizeof(*dpcpu), M_WAITOK);
 
 	/* CPU 0 is always boot CPU. */
 	CPU_SET(0, &all_cpus);