diff --git a/src/js_realm.hpp b/src/js_realm.hpp
index 4f41994c..3870f7ce 100644
--- a/src/js_realm.hpp
+++ b/src/js_realm.hpp
@@ -1183,7 +1183,8 @@ void RealmClass<T>::compute_size(ContextType ctx, ObjectType this_object, Argume
     args.validate_maximum(0);
 
     SharedRealm realm = *get_internal<T, RealmClass<T>>(this_object);
-    return_value.set(Value::from_number(ctx, realm->compute_size()));
+    auto size = realm->read_group().compute_aggregated_byte_size();
+    return_value.set(Value::from_number(ctx, size));
 }
 
 } // js
diff --git a/src/object-store b/src/object-store
index c12c750e..0bcb9643 160000
--- a/src/object-store
+++ b/src/object-store
@@ -1 +1 @@
-Subproject commit c12c750ecef2ba198d20ff073df05dfa2f750102
+Subproject commit 0bcb9643b8fb14323df697999b79c4a5341a8a21