diff --git a/exec.c b/exec.c
index 76d55ed..44cd424 100644
--- a/exec.c
+++ b/exec.c
@@ -2621,7 +2621,7 @@ static MemTxResult address_space_write_continue(AddressSpace *as, hwaddr addr,
 }
 
 MemTxResult address_space_write(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
-                                const uint8_t *buf, int len)
+                                const void *buf, int len)
 {
     hwaddr l;
     hwaddr addr1;
@@ -2734,7 +2734,7 @@ MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
                              uint8_t *buf, int len, bool is_write)
 {
     if (is_write) {
-        return address_space_write(as, addr, attrs, (uint8_t *)buf, len);
+        return address_space_write(as, addr, attrs, buf, len);
     } else {
         return address_space_read(as, addr, attrs, buf, len);
     }
@@ -3582,7 +3582,7 @@ void address_space_stq(AddressSpace *as, hwaddr addr, uint64_t val,
 {
     MemTxResult r;
     val = tswap64(val);
-    r = address_space_write(as, addr, attrs, (void *) &val, 8);
+    r = address_space_write(as, addr, attrs, &val, 8);
     if (result) {
         *result = r;
     }
@@ -3593,7 +3593,7 @@ void address_space_stq_le(AddressSpace *as, hwaddr addr, uint64_t val,
 {
     MemTxResult r;
     val = cpu_to_le64(val);
-    r = address_space_write(as, addr, attrs, (void *) &val, 8);
+    r = address_space_write(as, addr, attrs, &val, 8);
     if (result) {
         *result = r;
     }
@@ -3603,7 +3603,7 @@ void address_space_stq_be(AddressSpace *as, hwaddr addr, uint64_t val,
 {
     MemTxResult r;
     val = cpu_to_be64(val);
-    r = address_space_write(as, addr, attrs, (void *) &val, 8);
+    r = address_space_write(as, addr, attrs, &val, 8);
     if (result) {
         *result = r;
     }
diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c
index b8b33ee..e5712a2 100644
--- a/hw/net/dp8393x.c
+++ b/hw/net/dp8393x.c
@@ -431,7 +431,7 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
         size = sizeof(uint16_t) * width;
         address_space_write(&s->as,
             (s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA],
-            MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size);
+            MEMTXATTRS_UNSPECIFIED, data, size);
 
         if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) {
             /* Read footer of packet */
@@ -722,10 +722,10 @@ static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf,
     DPRINTF("Receive packet at %08x\n", (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0]);
     address = (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0];
     address_space_write(&s->as, address,
-        MEMTXATTRS_UNSPECIFIED, (uint8_t *)buf, rx_len);
+        MEMTXATTRS_UNSPECIFIED, buf, rx_len);
     address += rx_len;
     address_space_write(&s->as, address,
-        MEMTXATTRS_UNSPECIFIED, (uint8_t *)&checksum, 4);
+        MEMTXATTRS_UNSPECIFIED, &checksum, 4);
     rx_len += 4;
     s->regs[SONIC_CRBA1] = address >> 16;
     s->regs[SONIC_CRBA0] = address & 0xffff;
@@ -756,7 +756,7 @@ static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf,
     address_space_write(&s->as,
                         (s->regs[SONIC_URDA] << 16) |
                         s->regs[SONIC_CRDA],
-                        MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size);
+                        MEMTXATTRS_UNSPECIFIED, data, size);
 
     /* Move to next descriptor */
     size = sizeof(uint16_t) * width;
@@ -771,7 +771,7 @@ static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf,
         data[0 * width] = 0; /* in_use */
         address_space_write(&s->as,
             ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 6 * width,
-            MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, sizeof(uint16_t));
+            MEMTXATTRS_UNSPECIFIED, data, sizeof(uint16_t));
         s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
         s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX;
         s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) | (((s->regs[SONIC_RSC] & 0x00ff) + 1) & 0x00ff);
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 6e04cea..f4b7d59 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -164,7 +164,7 @@ static inline void vring_used_write(VirtQueue *vq, VRingUsedElem *uelem,
     virtio_tswap32s(vq->vdev, &uelem->len);
     pa = vq->vring.used + offsetof(VRingUsed, ring[i]);
     address_space_write(&address_space_memory, pa, MEMTXATTRS_UNSPECIFIED,
-                       (void *)uelem, sizeof(VRingUsedElem));
+                        uelem, sizeof(VRingUsedElem));
 }
 
 static uint16_t vring_used_idx(VirtQueue *vq)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 262ecab..7851ca9 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1304,7 +1304,7 @@ MemTxResult address_space_rw(AddressSpace *as, hwaddr addr,
  */
 MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
                                 MemTxAttrs attrs,
-                                const uint8_t *buf, int len);
+                                const void *buf, int len);
 
 /* address_space_ld*: load from an address space
  * address_space_st*: store to an address space
