diff --git a/extensions/openpower-pels/fru_identity.hpp b/extensions/openpower-pels/fru_identity.hpp
index ecc2899..bf7b2f7 100644
--- a/extensions/openpower-pels/fru_identity.hpp
+++ b/extensions/openpower-pels/fru_identity.hpp
@@ -82,10 +82,7 @@
      *
      * @return size_t - The size of the section
      */
-    size_t flattenedSize() const
-    {
-        return _size;
-    }
+    size_t flattenedSize() const;
 
     /**
      * @brief The failing component type for this FRU callout.