diff --git a/aidl_language.h b/aidl_language.h
index ada8832..bff983f 100644
--- a/aidl_language.h
+++ b/aidl_language.h
@@ -691,6 +691,7 @@
   }
 
   virtual void Dump(CodeWriter* writer) const = 0;
+  void DumpHeader(CodeWriter* writer) const;
 
  private:
   std::string name_;