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;