diff --git a/tools/llvm-objdump/llvm-objdump.h b/tools/llvm-objdump/llvm-objdump.h
index 75f852a..aa71b77 100644
--- a/tools/llvm-objdump/llvm-objdump.h
+++ b/tools/llvm-objdump/llvm-objdump.h
@@ -25,7 +25,7 @@
 void DisassembleInputMachO(StringRef Filename);
 
 class StringRefMemoryObject : public MemoryObject {
-private:
+  virtual void anchor();
   StringRef Bytes;
 public:
   StringRefMemoryObject(StringRef bytes) : Bytes(bytes) {}