diff --git a/physical.hpp b/physical.hpp
index 3592494..885bf55 100644
--- a/physical.hpp
+++ b/physical.hpp
@@ -29,7 +29,7 @@
 {
   public:
     Physical() = delete;
-    ~Physical() = default;
+    ~Physical() override = default;
     Physical(const Physical&) = delete;
     Physical& operator=(const Physical&) = delete;
     Physical(Physical&&) = delete;