1 files changed, 3 insertions, 2 deletions
diff --git a/include/llvm/Support/YAMLTraits.h b/include/llvm/Support/YAMLTraits.h
index 8be54394de..c19eb23c5c 100644
--- a/include/llvm/Support/YAMLTraits.h
+++ b/include/llvm/Support/YAMLTraits.h
@@ -725,6 +725,7 @@ private:
   virtual bool canElideEmptySequence();
 
   class HNode {
+    virtual void anchor();
   public:
     HNode(Node *n) : _node(n) { }
     virtual ~HNode() { }
@@ -734,9 +735,9 @@ private:
   };
 
   class EmptyHNode : public HNode {
+    virtual void anchor();
   public:
     EmptyHNode(Node *n) : HNode(n) { }
-    virtual ~EmptyHNode() {}
     static inline bool classof(const HNode *n) {
       return NullNode::classof(n->_node);
     }
@@ -744,9 +745,9 @@ private:
   };
 
   class ScalarHNode : public HNode {
+    virtual void anchor();
   public:
     ScalarHNode(Node *n, StringRef s) : HNode(n), _value(s) { }
-    virtual ~ScalarHNode() { }
 
     StringRef value() const { return _value; }