diff --git a/sdbusplus/asio/object_server.hpp b/sdbusplus/asio/object_server.hpp
index aba453f..dde17e9 100644
--- a/sdbusplus/asio/object_server.hpp
+++ b/sdbusplus/asio/object_server.hpp
@@ -30,6 +30,7 @@
 class callback
 {
   public:
+    virtual ~callback() = default;
     virtual int call(message::message& m) = 0;
 };
 
@@ -43,6 +44,7 @@
 class callback_set
 {
   public:
+    virtual ~callback_set() = default;
     virtual SetPropertyReturnValue call(message::message& m) = 0;
     virtual SetPropertyReturnValue set(const boost::any& value) = 0;
 };