diff --git a/watchdog.hpp b/watchdog.hpp
index 1a7a410..79df438 100644
--- a/watchdog.hpp
+++ b/watchdog.hpp
@@ -29,15 +29,18 @@
 
         /** @brief Constructs the Watchdog object
          *
-         *  @param[in] bus     - DBus bus to attach to
-         *  @param[in] objPath - Object path to attach to
+         *  @param[in] bus     - DBus bus to attach to.
+         *  @param[in] objPath - Object path to attach to.
          *  @param[in] event   - reference to sd_event unique pointer
+         *  @param[in] target  - systemd target to be called into on timeout
          */
         Watchdog(sdbusplus::bus::bus& bus,
                 const char* objPath,
-                EventPtr& event) :
+                EventPtr& event,
+                std::string&& target = std::string()) :
             WatchdogInherits(bus, objPath),
             bus(bus),
+            target(std::move(target)),
             timer(event, std::bind(&Watchdog::timeOutHandler, this))
         {
             // Nothing
@@ -83,6 +86,9 @@
         /** @brief sdbusplus handle */
         sdbusplus::bus::bus& bus;
 
+        /** @brief Systemd unit to be started when the timer expires */
+        std::string target;
+
         /** @brief Contained timer object */
         Timer timer;