diff --git a/include/exec/memory.h b/include/exec/memory.h
index 154626f9ad..c26ede33d2 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2764,7 +2764,7 @@ MemTxResult address_space_write_rom(AddressSpace *as, hwaddr addr,
 #include "exec/memory_ldst_phys.h.inc"
 
 struct MemoryRegionCache {
-    void *ptr;
+    uint8_t *ptr;
     hwaddr xlat;
     hwaddr len;
     FlatView *fv;