diff --git a/include/system/memory.h b/include/system/memory.h
index 9cd17847ab..3acaa30975 100644
--- a/include/system/memory.h
+++ b/include/system/memory.h
@@ -2850,7 +2850,8 @@ static inline MemoryRegion *address_space_translate(AddressSpace *as,
  * @is_write: indicates the transfer direction
  * @attrs: memory attributes
  */
-bool address_space_access_valid(AddressSpace *as, hwaddr addr, hwaddr len,
+bool address_space_access_valid(const AddressSpace *as,
+                                hwaddr addr, hwaddr len,
                                 bool is_write, MemTxAttrs attrs);
 
 /**
diff --git a/system/physmem.c b/system/physmem.c
index 7bcbf87573..a0561177af 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -3646,7 +3646,7 @@ static bool flatview_access_valid(FlatView *fv, hwaddr addr, hwaddr len,
     return true;
 }
 
-bool address_space_access_valid(AddressSpace *as, hwaddr addr,
+bool address_space_access_valid(const AddressSpace *as, hwaddr addr,
                                 hwaddr len, bool is_write,
                                 MemTxAttrs attrs)
 {