diff --git a/hw/intc/aspeed_intc.c b/hw/intc/aspeed_intc.c
index 465f41e4fd..558901570f 100644
--- a/hw/intc/aspeed_intc.c
+++ b/hw/intc/aspeed_intc.c
@@ -289,7 +289,7 @@ static void aspeed_intc_reset(DeviceState *dev)
 {
     AspeedINTCState *s = ASPEED_INTC(dev);
 
-    memset(s->regs, 0, sizeof(s->regs));
+    memset(s->regs, 0, ASPEED_INTC_NR_REGS << 2);
     memset(s->enable, 0, sizeof(s->enable));
     memset(s->mask, 0, sizeof(s->mask));
     memset(s->pending, 0, sizeof(s->pending));
@@ -307,6 +307,7 @@ static void aspeed_intc_realize(DeviceState *dev, Error **errp)
 
     sysbus_init_mmio(sbd, &s->iomem_container);
 
+    s->regs = g_new(uint32_t, ASPEED_INTC_NR_REGS);
     memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_intc_ops, s,
                           TYPE_ASPEED_INTC ".regs", ASPEED_INTC_NR_REGS << 2);
 
@@ -322,12 +323,21 @@ static void aspeed_intc_realize(DeviceState *dev, Error **errp)
     }
 }
 
+static void aspeed_intc_unrealize(DeviceState *dev)
+{
+    AspeedINTCState *s = ASPEED_INTC(dev);
+
+    g_free(s->regs);
+    s->regs = NULL;
+}
+
 static void aspeed_intc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->desc = "ASPEED INTC Controller";
     dc->realize = aspeed_intc_realize;
+    dc->unrealize = aspeed_intc_unrealize;
     device_class_set_legacy_reset(dc, aspeed_intc_reset);
     dc->vmsd = NULL;
 }
diff --git a/include/hw/intc/aspeed_intc.h b/include/hw/intc/aspeed_intc.h
index 03324f05ab..47ea0520b5 100644
--- a/include/hw/intc/aspeed_intc.h
+++ b/include/hw/intc/aspeed_intc.h
@@ -27,7 +27,7 @@ struct AspeedINTCState {
     MemoryRegion iomem;
     MemoryRegion iomem_container;
 
-    uint32_t regs[ASPEED_INTC_NR_REGS];
+    uint32_t *regs;
     OrIRQState orgates[ASPEED_INTC_NR_INTS];
     qemu_irq output_pins[ASPEED_INTC_NR_INTS];