diff --git a/hw/i2c/ppc4xx_i2c.c b/hw/i2c/ppc4xx_i2c.c
index d1936dbdca..4e0aaae1fc 100644
--- a/hw/i2c/ppc4xx_i2c.c
+++ b/hw/i2c/ppc4xx_i2c.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2007 Jocelyn Mayer
  * Copyright (c) 2012 François Revol
- * Copyright (c) 2016 BALATON Zoltan
+ * Copyright (c) 2016-2018 BALATON Zoltan
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -63,7 +63,6 @@ static void ppc4xx_i2c_reset(DeviceState *s)
     i2c->mdcntl = 0;
     i2c->sts = 0;
     i2c->extsts = 0x8f;
-    i2c->sdata = 0;
     i2c->lsadr = 0;
     i2c->hsadr = 0;
     i2c->clkdiv = 0;
@@ -71,7 +70,6 @@ static void ppc4xx_i2c_reset(DeviceState *s)
     i2c->xfrcnt = 0;
     i2c->xtcntlss = 0;
     i2c->directcntl = 0xf;
-    i2c->intr = 0;
 }
 
 static inline bool ppc4xx_i2c_is_master(PPC4xxI2CState *i2c)
@@ -139,9 +137,6 @@ static uint64_t ppc4xx_i2c_readb(void *opaque, hwaddr addr, unsigned int size)
                           TYPE_PPC4xx_I2C, __func__);
         }
         break;
-    case 2:
-        ret = i2c->sdata;
-        break;
     case 4:
         ret = i2c->lmadr;
         break;
@@ -181,9 +176,6 @@ static uint64_t ppc4xx_i2c_readb(void *opaque, hwaddr addr, unsigned int size)
     case 16:
         ret = i2c->directcntl;
         break;
-    case 17:
-        ret = i2c->intr;
-        break;
     default:
         if (addr < PPC4xx_I2C_MEM_SIZE) {
             qemu_log_mask(LOG_UNIMP, "%s: Unimplemented register 0x%"
@@ -229,9 +221,6 @@ static void ppc4xx_i2c_writeb(void *opaque, hwaddr addr, uint64_t value,
             }
         }
         break;
-    case 2:
-        i2c->sdata = value;
-        break;
     case 4:
         i2c->lmadr = value;
         if (i2c_bus_busy(i2c->bus)) {
@@ -302,9 +291,6 @@ static void ppc4xx_i2c_writeb(void *opaque, hwaddr addr, uint64_t value,
     case 16:
         i2c->directcntl = value & 0x7;
         break;
-    case 17:
-        i2c->intr = value;
-        break;
     default:
         if (addr < PPC4xx_I2C_MEM_SIZE) {
             qemu_log_mask(LOG_UNIMP, "%s: Unimplemented register 0x%"
diff --git a/include/hw/i2c/ppc4xx_i2c.h b/include/hw/i2c/ppc4xx_i2c.h
index 3c603071bd..e4b6ded855 100644
--- a/include/hw/i2c/ppc4xx_i2c.h
+++ b/include/hw/i2c/ppc4xx_i2c.h
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2007 Jocelyn Mayer
  * Copyright (c) 2012 François Revol
- * Copyright (c) 2016 BALATON Zoltan
+ * Copyright (c) 2016-2018 BALATON Zoltan
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -49,7 +49,6 @@ typedef struct PPC4xxI2CState {
     uint8_t mdcntl;
     uint8_t sts;
     uint8_t extsts;
-    uint8_t sdata;
     uint8_t lsadr;
     uint8_t hsadr;
     uint8_t clkdiv;
@@ -57,7 +56,6 @@ typedef struct PPC4xxI2CState {
     uint8_t xfrcnt;
     uint8_t xtcntlss;
     uint8_t directcntl;
-    uint8_t intr;
 } PPC4xxI2CState;
 
 #endif /* PPC4XX_I2C_H */