1 files changed, 1 insertions, 1 deletions
diff --git a/include/hw/rtc/mc146818rtc.h b/include/hw/rtc/mc146818rtc.h
index 33d85753c0..1db0fcee92 100644
--- a/include/hw/rtc/mc146818rtc.h
+++ b/include/hw/rtc/mc146818rtc.h
@@ -26,6 +26,7 @@ struct RTCState {
     uint8_t cmos_data[128];
     uint8_t cmos_index;
     uint8_t isairq;
+    uint16_t io_base;
     int32_t base_year;
     uint64_t base_rtc;
     uint64_t last_update;
@@ -49,7 +50,6 @@ struct RTCState {
 };
 
 #define RTC_ISA_IRQ 8
-#define RTC_ISA_BASE 0x70
 
 ISADevice *mc146818_rtc_init(ISABus *bus, int base_year,
                              qemu_irq intercept_irq);