Index: sys/arm64/arm64/intr_machdep.c
===================================================================
--- sys/arm64/arm64/intr_machdep.c
+++ sys/arm64/arm64/intr_machdep.c
@@ -149,6 +149,7 @@
 intr_allocate(u_int hw_irq)
 {
 	struct arm64_intr_entry *intr;
+	char intrname[INTRNAME_LEN];
 
 	/* Check if already allocated */
 	mtx_lock_spin(&intr_list_lock);
@@ -175,6 +176,11 @@
 	intr->i_cntidx = atomic_fetchadd_int(&intrcntidx, 1);
 	intr->i_cntp = &intrcnt[intr->i_cntidx];
 	intr->i_hw_irq = hw_irq;
+
+	/* Initialize interrupt name with default string */
+	sprintf(intrname, "irq%u:", hw_irq);
+	intrcnt_setname(intrname, intr->i_cntidx);
+
 	mtx_lock_spin(&intr_list_lock);
 	SLIST_INSERT_HEAD(&irq_slist_head, intr, entries);
 	mtx_unlock_spin(&intr_list_lock);