diff --git a/extensions/openpower-pels/registry.hpp b/extensions/openpower-pels/registry.hpp
index c3b3bc0..0314081 100644
--- a/extensions/openpower-pels/registry.hpp
+++ b/extensions/openpower-pels/registry.hpp
@@ -59,6 +59,11 @@
      *        in the Message field.
      */
     std::optional<std::vector<std::string>> messageArgSources;
+
+    /**
+     * @brief An optional vector of string that forms the Notes field.
+     */
+    std::optional<std::vector<std::string>> notes;
 };
 
 /**