diff --git a/rust/qemu-api/src/vmstate.rs b/rust/qemu-api/src/vmstate.rs
index e3233303f2..e2a1f7a97a 100644
--- a/rust/qemu-api/src/vmstate.rs
+++ b/rust/qemu-api/src/vmstate.rs
@@ -256,6 +256,10 @@ impl VMStateField {
         if (self.flags.0 & VMStateFlags::VMS_POINTER.0) != 0 {
             self.flags = VMStateFlags(self.flags.0 & !VMStateFlags::VMS_POINTER.0);
             self.flags = VMStateFlags(self.flags.0 | VMStateFlags::VMS_ARRAY_OF_POINTER.0);
+            // VMS_ARRAY_OF_POINTER flag stores the size of pointer.
+            // FIXME: *const, *mut, NonNull and Box<> have the same size as usize.
+            //        Resize if more smart pointers are supported.
+            self.size = std::mem::size_of::<usize>();
         }
         self.flags = VMStateFlags(self.flags.0 & !VMStateFlags::VMS_SINGLE.0);
         self.flags = VMStateFlags(self.flags.0 | VMStateFlags::VMS_ARRAY.0);