diff --git a/mux_filter.h b/mux_filter.h
index 29240f3..baaf10c 100644
--- a/mux_filter.h
+++ b/mux_filter.h
@@ -17,7 +17,7 @@
   virtual ~MuxFilter();
   void FilterFrame(Frame* previous, Frame* current, size_t num_slots);
 private:
-  scoped_array<NoiseFilter*> filters_;
+  scoped_ptr<NoiseFilter*[]> filters_;
   size_t num_filters_;
 };