diff --git a/src/js_realm.hpp b/src/js_realm.hpp
index 638c634c..ad68b0f9 100644
--- a/src/js_realm.hpp
+++ b/src/js_realm.hpp
@@ -62,9 +62,7 @@ class RealmDelegate : public BindingContext {
     using ObjectDefaultsMap = typename Schema<T>::ObjectDefaultsMap;
     using ConstructorMap = typename Schema<T>::ConstructorMap;
 
-    virtual void did_change(std::vector<ObserverState> const& observers,
-                            std::vector<void*> const& invalidated,
-                            bool version_changed=true) {
+    virtual void did_change(std::vector<ObserverState> const& observers, std::vector<void*> const& invalidated, bool version_changed) {
         notify("change");
     }
     virtual std::vector<ObserverState> get_observed_rows() {
diff --git a/src/object-store b/src/object-store
index ddf845eb..64e0fa20 160000
--- a/src/object-store
+++ b/src/object-store
@@ -1 +1 @@
-Subproject commit ddf845eb23884f6644d15c896952ee0f5ea5ad57
+Subproject commit 64e0fa208c0ba8147f05d02fe41353b345901804