diff --git a/llvm/include/llvm/CodeGen/LexicalScopes.h b/llvm/include/llvm/CodeGen/LexicalScopes.h
index dbdb58e24370..ccbd6dae6c5e 100644
--- a/llvm/include/llvm/CodeGen/LexicalScopes.h
+++ b/llvm/include/llvm/CodeGen/LexicalScopes.h
@@ -44,7 +44,7 @@ typedef std::pair<const MachineInstr *, const MachineInstr *> InsnRange;
 class LexicalScopes {
 public:
   LexicalScopes() : MF(NULL),  CurrentFnLexicalScope(NULL) { }
-  ~LexicalScopes();
+  virtual ~LexicalScopes();
 
   /// initialize - Scan machine function and constuct lexical scope nest.
   virtual void initialize(const MachineFunction &);