diff --git a/Libraries/LibJS/Runtime/Shape.cpp b/Libraries/LibJS/Runtime/Shape.cpp
index 5e018465f3..6c78e7c8d6 100644
--- a/Libraries/LibJS/Runtime/Shape.cpp
+++ b/Libraries/LibJS/Runtime/Shape.cpp
@@ -73,21 +73,21 @@ Shape::Shape(GlobalObject& global_object)
 }
 
 Shape::Shape(Shape& previous_shape, const StringOrSymbol& property_name, PropertyAttributes attributes, TransitionType transition_type)
-    : m_global_object(previous_shape.m_global_object)
+    : m_attributes(attributes)
+    , m_transition_type(transition_type)
+    , m_global_object(previous_shape.m_global_object)
     , m_previous(&previous_shape)
     , m_property_name(property_name)
-    , m_attributes(attributes)
     , m_prototype(previous_shape.m_prototype)
-    , m_transition_type(transition_type)
     , m_property_count(transition_type == TransitionType::Put ? previous_shape.m_property_count + 1 : previous_shape.m_property_count)
 {
 }
 
 Shape::Shape(Shape& previous_shape, Object* new_prototype)
-    : m_global_object(previous_shape.m_global_object)
+    : m_transition_type(TransitionType::Prototype)
+    , m_global_object(previous_shape.m_global_object)
     , m_previous(&previous_shape)
     , m_prototype(new_prototype)
-    , m_transition_type(TransitionType::Prototype)
     , m_property_count(previous_shape.m_property_count)
 {
 }
diff --git a/Libraries/LibJS/Runtime/Shape.h b/Libraries/LibJS/Runtime/Shape.h
index 3c2f402a86..7f50352dec 100644
--- a/Libraries/LibJS/Runtime/Shape.h
+++ b/Libraries/LibJS/Runtime/Shape.h
@@ -103,6 +103,11 @@ private:
 
     void ensure_property_table() const;
 
+    PropertyAttributes m_attributes { 0 };
+    TransitionType m_transition_type : 6 { TransitionType::Invalid };
+    bool m_unique : 1 { false };
+    mutable bool m_has_property_table : 1 { false };
+
     GlobalObject& m_global_object;
 
     mutable OwnPtr<HashMap<StringOrSymbol, PropertyMetadata>> m_property_table;
@@ -110,10 +115,7 @@ private:
     HashMap<TransitionKey, Shape*> m_forward_transitions;
     Shape* m_previous { nullptr };
     StringOrSymbol m_property_name;
-    PropertyAttributes m_attributes { 0 };
-    bool m_unique { false };
     Object* m_prototype { nullptr };
-    TransitionType m_transition_type { TransitionType::Invalid };
     size_t m_property_count { 0 };
 };