--- a/native/src/window.cpp
+++ b/native/src/window.cpp
@@ -9,4 +9,4 @@
 
 int Window::sum() const { return std::accumulate(samples_.begin(), samples_.end(), 0); }
 
-bool disabled(const Window& w) { return w.size() == 0; }
+bool disabled(const Window& w) { return w.empty(); }