diff --git a/fw-update/update_manager.hpp b/fw-update/update_manager.hpp
index 780ce49..26a1de9 100644
--- a/fw-update/update_manager.hpp
+++ b/fw-update/update_manager.hpp
@@ -3,6 +3,7 @@
 #include "common/instance_id.hpp"
 #include "common/types.hpp"
 #include "device_updater.hpp"
+#include "fw-update/activation.hpp"
 #include "package_parser.hpp"
 #include "requester/handler.hpp"
 #include "watch.hpp"
@@ -30,9 +31,6 @@
 using DeviceUpdaterInfos = std::vector<DeviceUpdaterInfo>;
 using TotalComponentUpdates = size_t;
 
-class Activation;
-class ActivationProgress;
-
 class UpdateManager
 {
   public: