diff --git a/extensions/openpower-pels/user_header.hpp b/extensions/openpower-pels/user_header.hpp
index d212831..b338f1b 100644
--- a/extensions/openpower-pels/user_header.hpp
+++ b/extensions/openpower-pels/user_header.hpp
@@ -211,7 +211,7 @@
      */
     static constexpr size_t flattenedSize()
     {
-        return Section::flattenedSize() + sizeof(_eventSubsystem) +
+        return Section::headerSize() + sizeof(_eventSubsystem) +
                sizeof(_eventScope) + sizeof(_eventSeverity) +
                sizeof(_eventType) + sizeof(_reserved4Byte1) +
                sizeof(_problemDomain) + sizeof(_problemVector) +