diff --git a/include/hw/watchdog/wdt_aspeed.h b/include/hw/watchdog/wdt_aspeed.h
index dfa5dfa424..db91ee6b51 100644
--- a/include/hw/watchdog/wdt_aspeed.h
+++ b/include/hw/watchdog/wdt_aspeed.h
@@ -40,7 +40,7 @@ struct AspeedWDTState {
 struct AspeedWDTClass {
     SysBusDeviceClass parent_class;
 
-    uint32_t offset;
+    uint32_t iosize;
     uint32_t ext_pulse_width_mask;
     uint32_t reset_ctrl_reg;
     void (*reset_pulse)(AspeedWDTState *s, uint32_t property);
diff --git a/hw/arm/aspeed_ast10x0.c b/hw/arm/aspeed_ast10x0.c
index 4d0b9b115f..b483735dc2 100644
--- a/hw/arm/aspeed_ast10x0.c
+++ b/hw/arm/aspeed_ast10x0.c
@@ -318,14 +318,14 @@ static void aspeed_soc_ast1030_realize(DeviceState *dev_soc, Error **errp)
     /* Watch dog */
     for (i = 0; i < sc->wdts_num; i++) {
         AspeedWDTClass *awc = ASPEED_WDT_GET_CLASS(&s->wdt[i]);
+        hwaddr wdt_offset = sc->memmap[ASPEED_DEV_WDT] + i * awc->iosize;
 
         object_property_set_link(OBJECT(&s->wdt[i]), "scu", OBJECT(&s->scu),
                                  &error_abort);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), errp)) {
             return;
         }
-        aspeed_mmio_map(s, SYS_BUS_DEVICE(&s->wdt[i]), 0,
-                        sc->memmap[ASPEED_DEV_WDT] + i * awc->offset);
+        aspeed_mmio_map(s, SYS_BUS_DEVICE(&s->wdt[i]), 0, wdt_offset);
     }
 
     /* GPIO */
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 37f43b4165..75add765c6 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -467,14 +467,14 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     /* Watch dog */
     for (i = 0; i < sc->wdts_num; i++) {
         AspeedWDTClass *awc = ASPEED_WDT_GET_CLASS(&s->wdt[i]);
+        hwaddr wdt_offset = sc->memmap[ASPEED_DEV_WDT] + i * awc->iosize;
 
         object_property_set_link(OBJECT(&s->wdt[i]), "scu", OBJECT(&s->scu),
                                  &error_abort);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), errp)) {
             return;
         }
-        aspeed_mmio_map(s, SYS_BUS_DEVICE(&s->wdt[i]), 0,
-                        sc->memmap[ASPEED_DEV_WDT] + i * awc->offset);
+        aspeed_mmio_map(s, SYS_BUS_DEVICE(&s->wdt[i]), 0, wdt_offset);
     }
 
     /* RAM */
diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index b05b9dd416..e884d6badc 100644
--- a/hw/arm/aspeed_soc.c
+++ b/hw/arm/aspeed_soc.c
@@ -386,14 +386,14 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     /* Watch dog */
     for (i = 0; i < sc->wdts_num; i++) {
         AspeedWDTClass *awc = ASPEED_WDT_GET_CLASS(&s->wdt[i]);
+        hwaddr wdt_offset = sc->memmap[ASPEED_DEV_WDT] + i * awc->iosize;
 
         object_property_set_link(OBJECT(&s->wdt[i]), "scu", OBJECT(&s->scu),
                                  &error_abort);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), errp)) {
             return;
         }
-        aspeed_mmio_map(s, SYS_BUS_DEVICE(&s->wdt[i]), 0,
-                        sc->memmap[ASPEED_DEV_WDT] + i * awc->offset);
+        aspeed_mmio_map(s, SYS_BUS_DEVICE(&s->wdt[i]), 0, wdt_offset);
     }
 
     /* RAM  */
diff --git a/hw/watchdog/wdt_aspeed.c b/hw/watchdog/wdt_aspeed.c
index d753693a2e..958725a1b5 100644
--- a/hw/watchdog/wdt_aspeed.c
+++ b/hw/watchdog/wdt_aspeed.c
@@ -309,7 +309,7 @@ static void aspeed_2400_wdt_class_init(ObjectClass *klass, void *data)
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
 
     dc->desc = "ASPEED 2400 Watchdog Controller";
-    awc->offset = 0x20;
+    awc->iosize = 0x20;
     awc->ext_pulse_width_mask = 0xff;
     awc->reset_ctrl_reg = SCU_RESET_CONTROL1;
     awc->wdt_reload = aspeed_wdt_reload;
@@ -346,7 +346,7 @@ static void aspeed_2500_wdt_class_init(ObjectClass *klass, void *data)
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
 
     dc->desc = "ASPEED 2500 Watchdog Controller";
-    awc->offset = 0x20;
+    awc->iosize = 0x20;
     awc->ext_pulse_width_mask = 0xfffff;
     awc->reset_ctrl_reg = SCU_RESET_CONTROL1;
     awc->reset_pulse = aspeed_2500_wdt_reset_pulse;
@@ -369,7 +369,7 @@ static void aspeed_2600_wdt_class_init(ObjectClass *klass, void *data)
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
 
     dc->desc = "ASPEED 2600 Watchdog Controller";
-    awc->offset = 0x40;
+    awc->iosize = 0x40;
     awc->ext_pulse_width_mask = 0xfffff; /* TODO */
     awc->reset_ctrl_reg = AST2600_SCU_RESET_CONTROL1;
     awc->reset_pulse = aspeed_2500_wdt_reset_pulse;
@@ -392,7 +392,7 @@ static void aspeed_1030_wdt_class_init(ObjectClass *klass, void *data)
     AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
 
     dc->desc = "ASPEED 1030 Watchdog Controller";
-    awc->offset = 0x80;
+    awc->iosize = 0x80;
     awc->ext_pulse_width_mask = 0xfffff; /* TODO */
     awc->reset_ctrl_reg = AST2600_SCU_RESET_CONTROL1;
     awc->reset_pulse = aspeed_2500_wdt_reset_pulse;
