diff --git a/props/saber_fett263_buttons.h b/props/saber_fett263_buttons.h
index 48550edfe..3a304f8fd 100644
--- a/props/saber_fett263_buttons.h
+++ b/props/saber_fett263_buttons.h
@@ -1800,7 +1800,7 @@ SaberFett263Buttons() : PropBase() {}
     RestoreGestureState();
   }
 
-  bool chdir(const char* dir) override {
+  bool chdir(const StringPiece dir) override {
     bool ret = PropBase::chdir(dir);
     num_tracks_ = RunCommandAndGetSingleLine("list_current_tracks", nullptr, 0, 0, 0);
     track_num_ = 0;