diff --git a/callback-manager/src/callback_manager.cpp b/callback-manager/src/callback_manager.cpp
index 3eba4b1..15e96b0 100644
--- a/callback-manager/src/callback_manager.cpp
+++ b/callback-manager/src/callback_manager.cpp
@@ -16,6 +16,8 @@
 
 #include "callback_manager.hpp"
 
+#include <boost/asio/io_service.hpp>
+#include <boost/asio/steady_timer.hpp>
 #include <boost/container/flat_map.hpp>
 #include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/asio/object_server.hpp>