diff --git a/Userland/Applications/Piano/PlayerWidget.cpp b/Userland/Applications/Piano/PlayerWidget.cpp
index be4011d6eb..44dfeca6f7 100644
--- a/Userland/Applications/Piano/PlayerWidget.cpp
+++ b/Userland/Applications/Piano/PlayerWidget.cpp
@@ -53,7 +53,7 @@ ErrorOr<void> PlayerWidget::initialize()
     m_track_dropdown->set_model_column(0);
     m_track_dropdown->set_selected_index(0);
     m_track_dropdown->on_change = [this]([[maybe_unused]] auto name, GUI::ModelIndex model_index) {
-        m_track_manager.set_current_track(model_index.row());
+        m_track_manager.set_current_track(static_cast<size_t>(model_index.row()));
     };
 
     m_add_track_button = TRY(try_add<GUI::Button>());
diff --git a/Userland/Applications/Piano/TrackManager.h b/Userland/Applications/Piano/TrackManager.h
index 5076cc4183..a077d92457 100644
--- a/Userland/Applications/Piano/TrackManager.h
+++ b/Userland/Applications/Piano/TrackManager.h
@@ -27,10 +27,10 @@ public:
     ~TrackManager() = default;
 
     NonnullRefPtr<DSP::NoteTrack> current_track() { return *m_tracks[m_current_track]; }
-    int track_count() { return m_tracks.size(); };
+    size_t track_count() { return m_tracks.size(); };
     void set_current_track(size_t track_index)
     {
-        VERIFY((int)track_index < track_count());
+        VERIFY(track_index < track_count());
         m_current_track = track_index;
     }