diff --git a/control/json/triggers/handlers.hpp b/control/json/triggers/handlers.hpp
index 2a52757..102a214 100644
--- a/control/json/triggers/handlers.hpp
+++ b/control/json/triggers/handlers.hpp
@@ -50,6 +50,47 @@
                         std::get<Prop>(obj), itProp->second);
         return true;
     }
+
+    /**
+     * @brief Processes an interfaces added signal and adds the interface
+     * (including property & property value) to the manager's object cache
+     *
+     * @param[in] msg - The sdbusplus signal message
+     * @param[in] obj - Object data associated with the signal
+     * @param[in] mgr - Manager that stores the object cache
+     */
+    static bool interfacesAdded(message& msg, const SignalObject& obj,
+                                Manager& mgr)
+    {
+        sdbusplus::message::object_path op;
+        msg.read(op);
+        if (static_cast<const std::string&>(op) != std::get<Path>(obj))
+        {
+            // Path name does not match object's path
+            return false;
+        }
+
+        std::map<std::string, std::map<std::string, PropertyVariantType>>
+            intfProps;
+        msg.read(intfProps);
+        auto itIntf = intfProps.find(std::get<Intf>(obj));
+        if (itIntf == intfProps.cend())
+        {
+            // Object's interface not in dictionary of interfaces added
+            return false;
+        }
+
+        auto itProp = itIntf->second.find(std::get<Prop>(obj));
+        if (itProp == itIntf->second.cend())
+        {
+            // Object's property not in dictionary of properties of interface
+            return false;
+        }
+
+        mgr.setProperty(std::get<Path>(obj), std::get<Intf>(obj),
+                        std::get<Prop>(obj), itProp->second);
+        return true;
+    }
 };
 
 } // namespace phosphor::fan::control::json::trigger::signal