diff --git a/src/core/article.h b/src/core/article.h
index 50c0a9d..990ea1f 100644
--- a/src/core/article.h
+++ b/src/core/article.h
@@ -16,7 +16,7 @@ class Article : public EntityUuid
   public:
     Article() = default;
     Article(int price);
-    //virtual ~Article() = default;
+    virtual ~Article() = default;
 
     void setArticleNo(int articleNo);
     void setPrice(int price);
diff --git a/src/core/seller.h b/src/core/seller.h
index a4bfde1..0c84958 100644
--- a/src/core/seller.h
+++ b/src/core/seller.h
@@ -14,7 +14,7 @@ class Seller : public EntityInt
 {
   public:
     Seller() = default;
-    ~Seller() = default;
+    virtual ~Seller() = default;
     Seller(const std::string& firstName, const std::string& lastName, int sellerNo = 0,
            int numArticlesOffered = 0);