diff --git a/include/CLI/App.hpp b/include/CLI/App.hpp
index 0c890728..543b85a1 100644
--- a/include/CLI/App.hpp
+++ b/include/CLI/App.hpp
@@ -197,6 +197,9 @@ class App {
         set_help_flag("-h,--help", "Print this help message and exit");
     }
 
+    /// virtual destructor
+    virtual ~App() = default;
+
     /// Set a callback for the end of parsing.
     ///
     /// Due to a bug in c++11,