diff --git a/src/Application/Application.h b/src/Application/Application.h
index f9dc920..0127256 100644
--- a/src/Application/Application.h
+++ b/src/Application/Application.h
@@ -63,7 +63,7 @@ class Application: public Platform::Sdl2Application, public efsw::FileWatchListe
                               const std::string& dir,
                               const std::string& filename,
                               efsw::Action action,
-                              std::string old_filename = "") override;
+                              std::string old_filename) override;
 
     private:
         // Events