diff --git a/core/src/objects/service/workspace.cpp b/core/src/objects/service/workspace.cpp
index 38dba8e..de0d474 100644
--- a/core/src/objects/service/workspace.cpp
+++ b/core/src/objects/service/workspace.cpp
@@ -78,12 +78,13 @@ void Workspace::InitService() {
     // physicsWorld->setSleepAngularVelocity(5);
 
     physicsWorld->setEventListener(&physicsEventListener);
+}
 
-    // Sync all parts
+void Workspace::OnRun() {
+    // Make joints
     for (auto it = this->GetDescendantsStart(); it != this->GetDescendantsEnd(); it++) {
-        std::shared_ptr<Instance> obj = *it;
-        if (!obj->IsA<Part>()) continue;
-        std::shared_ptr<Part> part = obj->CastTo<Part>().expect();
+        if (!it->IsA<Part>()) continue;
+        std::shared_ptr<Part> part = it->CastTo<Part>().expect();
         part->MakeJoints();
     }
 
diff --git a/core/src/objects/service/workspace.h b/core/src/objects/service/workspace.h
index 4111680..6fa3bec 100644
--- a/core/src/objects/service/workspace.h
+++ b/core/src/objects/service/workspace.h
@@ -75,6 +75,7 @@ class DEF_INST_SERVICE_(explorer_icon="workspace") Workspace : public Service {
     void updatePartPhysics(std::shared_ptr<Part> part);
 protected:
     void InitService() override;
+    void OnRun() override;
     bool initialized = false;
 
 public: