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
@@ -364,6 +364,8 @@
 	ii->ii_send_arg = isrc;
 	strlcpy(ii->ii_name, name, INTR_IPI_NAMELEN);
 	ii->ii_count = intr_ipi_setup_counters(name);
+
+	PIC_ENABLE_INTR(intr_irq_root_dev, isrc);
 }
 
 static void