diff --git a/source/mijin/container/vector_map.hpp b/source/mijin/container/vector_map.hpp
index af99853..3fa016e 100644
--- a/source/mijin/container/vector_map.hpp
+++ b/source/mijin/container/vector_map.hpp
@@ -117,6 +117,10 @@ private:
     std::vector<TKey, TKeyAllocator> keys_;
     std::vector<TValue, TValueAllocator> values_;
 public:
+    VectorMap() noexcept = default;
+    VectorMap(const VectorMap&) = default;
+    VectorMap(VectorMap&&) MIJIN_NOEXCEPT = default;
+    
     VectorMap& operator=(const VectorMap&) = default;
     VectorMap& operator=(VectorMap&&) MIJIN_NOEXCEPT = default;
     auto operator<=>(const VectorMap& other) const noexcept = default;