diff --git a/pldm.hpp b/pldm.hpp
index 945d7a1..40bc78b 100644
--- a/pldm.hpp
+++ b/pldm.hpp
@@ -58,9 +58,10 @@
     explicit Interface(
         std::function<bool(open_power::occ::instanceID, bool)> callBack,
         std::function<void(open_power::occ::instanceID, bool)> sbeCallBack,
-        EventPtr& event) :
+        std::function<void(bool)> safeModeCallBack, EventPtr& event) :
         callBack(callBack),
-        sbeCallBack(sbeCallBack), event(event),
+        sbeCallBack(sbeCallBack), safeModeCallBack(safeModeCallBack),
+        event(event),
         pldmEventSignal(
             open_power::occ::utils::getBus(),
             MatchRules::type::signal() +
@@ -154,6 +155,11 @@
     std::function<void(open_power::occ::instanceID, bool)> sbeCallBack =
         nullptr;
 
+    /** @brief Callback handler to be invoked when the OCC is in SAFE Mode =
+     *         true or when OCCs are in_service = false.
+     */
+    std::function<void(bool)> safeModeCallBack = nullptr;
+
     /** @brief reference to sd_event wrapped in unique_ptr */
     EventPtr& event;