diff --git a/item_updater.hpp b/item_updater.hpp
index 898b07c..59f9839 100644
--- a/item_updater.hpp
+++ b/item_updater.hpp
@@ -136,7 +136,7 @@
     /**
      * @brief Deletes all versions except for the current one
      */
-    void deleteAll();
+    void deleteAll() override;
 
     /** @brief Creates an active association to the
      *  newly active software image