diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c
index 25e4c0cd5b..9e1f12cd33 100644
--- a/hw/net/ftgmac100.c
+++ b/hw/net/ftgmac100.c
@@ -1107,9 +1107,14 @@ static void ftgmac100_realize(DeviceState *dev, Error **errp)
         s->rxdes0_edorr = FTGMAC100_RXDES0_EDORR;
     }
 
-    memory_region_init_io(&s->iomem, OBJECT(dev), &ftgmac100_ops, s,
-                          TYPE_FTGMAC100, 0x2000);
-    sysbus_init_mmio(sbd, &s->iomem);
+    memory_region_init(&s->iomem_container, OBJECT(s),
+                       TYPE_FTGMAC100 ".container", FTGMAC100_MEM_SIZE);
+    sysbus_init_mmio(sbd, &s->iomem_container);
+
+    memory_region_init_io(&s->iomem, OBJECT(s), &ftgmac100_ops, s,
+                          TYPE_FTGMAC100 ".regs", FTGMAC100_REG_MEM_SIZE);
+    memory_region_add_subregion(&s->iomem_container, 0x0, &s->iomem);
+
     sysbus_init_irq(sbd, &s->irq);
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
 
diff --git a/include/hw/net/ftgmac100.h b/include/hw/net/ftgmac100.h
index 765d1538a4..269446e858 100644
--- a/include/hw/net/ftgmac100.h
+++ b/include/hw/net/ftgmac100.h
@@ -14,6 +14,9 @@
 #define TYPE_FTGMAC100 "ftgmac100"
 OBJECT_DECLARE_SIMPLE_TYPE(FTGMAC100State, FTGMAC100)
 
+#define FTGMAC100_MEM_SIZE 0x1000
+#define FTGMAC100_REG_MEM_SIZE 0x100
+
 #include "hw/sysbus.h"
 #include "net/net.h"
 
@@ -30,6 +33,7 @@ struct FTGMAC100State {
     NICState *nic;
     NICConf conf;
     qemu_irq irq;
+    MemoryRegion iomem_container;
     MemoryRegion iomem;
 
     uint8_t frame[FTGMAC100_MAX_FRAME_SIZE];