diff --git a/src/main/cpp/option_processor.h b/src/main/cpp/option_processor.h
index b09a5fc..46fd61e 100644
--- a/src/main/cpp/option_processor.h
+++ b/src/main/cpp/option_processor.h
@@ -97,7 +97,7 @@
   // Gets the arguments explicitly provided by the user's command line.
   std::vector<std::string> GetExplicitCommandArguments() const;
 
-  StartupOptions* GetParsedStartupOptions() const;
+  virtual StartupOptions* GetParsedStartupOptions() const;
 
   virtual blaze_exit_code::ExitCode FindUserBlazerc(
       const char* cmdLineRcFile,