diff --git a/clang/lib/CodeGen/Mangle.h b/clang/lib/CodeGen/Mangle.h
index f1c5358..a12a140 100644
--- a/clang/lib/CodeGen/Mangle.h
+++ b/clang/lib/CodeGen/Mangle.h
@@ -84,6 +84,8 @@
                          Diagnostic &Diags)
     : Context(Context), Diags(Diags) { }
 
+  virtual ~MangleContext() { }
+
   ASTContext &getASTContext() const { return Context; }
 
   Diagnostic &getDiags() const { return Diags; }