1 files changed, 4 insertions, 0 deletions
diff --git a/backend/List.h b/backend/List.h
index 58efbe2..1af0b35 100644
--- a/backend/List.h
+++ b/backend/List.h
@@ -18,6 +18,10 @@ struct ListLink {
 template<typename T>
 class List {
 public:
+	List() = default;
+	virtual ~List();
+
+public:
 	size_t size() const;
 
 	void push_back(T & el);