diff --git a/extensions/openpower-pels/fru_identity.hpp b/extensions/openpower-pels/fru_identity.hpp
index bcb2956..993b32b 100644
--- a/extensions/openpower-pels/fru_identity.hpp
+++ b/extensions/openpower-pels/fru_identity.hpp
@@ -103,7 +103,7 @@
      * @param[in] procedureFromRegistry - The maintenance procedure name
      *                                    as defined in the message registry.
      */
-    FRUIdentity(const std::string& procedureFromRegistry) :
+    explicit FRUIdentity(const std::string& procedureFromRegistry) :
         FRUIdentity(procedureFromRegistry, CalloutValueType::registryName)
     {
     }