diff --git a/firmware_handler.hpp b/firmware_handler.hpp
index 73a0668..2b2c7d3 100644
--- a/firmware_handler.hpp
+++ b/firmware_handler.hpp
@@ -133,7 +133,8 @@
         handlers(firmwares),
         blobIDs(blobs), transports(transports), bitmask(bitmask),
         activeImage(activeImageBlobId), activeHash(activeHashBlobId),
-        verifyImage(verifyBlobId), lookup(), state(UpdateState::notYetStarted),
+        verifyImage(verifyBlobId), updateImage(updateBlobId), lookup(),
+        state(UpdateState::notYetStarted),
         verification(std::move(verification)), update(std::move(update))
     {
     }
@@ -190,6 +191,9 @@
     /** Session for verification. */
     Session verifyImage;
 
+    /** Session for update. */
+    Session updateImage;
+
     /** A quick method for looking up a session's mechanisms and details. */
     std::map<std::uint16_t, Session*> lookup;
 
diff --git a/util.cpp b/util.cpp
index 05780b8..be18d72 100644
--- a/util.cpp
+++ b/util.cpp
@@ -19,6 +19,7 @@
 namespace ipmi_flash
 {
 
+const std::string updateBlobId = "/flash/update";
 const std::string verifyBlobId = "/flash/verify";
 const std::string hashBlobId = "/flash/hash";
 const std::string activeImageBlobId = "/flash/active/image";
diff --git a/util.hpp b/util.hpp
index f304b1c..fd3a818 100644
--- a/util.hpp
+++ b/util.hpp
@@ -5,6 +5,7 @@
 namespace ipmi_flash
 {
 
+extern const std::string updateBlobId;
 extern const std::string verifyBlobId;
 extern const std::string hashBlobId;
 extern const std::string activeImageBlobId;