diff --git a/firmware_handler.hpp b/firmware_handler.hpp
index f5239b4..916a5ce 100644
--- a/firmware_handler.hpp
+++ b/firmware_handler.hpp
@@ -68,6 +68,8 @@
     bool expire(uint16_t session) override;
 
     static const std::string hashBlobID;
+    static const std::string activeImageBlobID;
+    static const std::string activeHashBlobID;
 
   private:
     std::vector<std::string> blobIDs;