diff --git a/monitor/fan.hpp b/monitor/fan.hpp
index d4bcb2d..8d9f3b2 100644
--- a/monitor/fan.hpp
+++ b/monitor/fan.hpp
@@ -213,8 +213,10 @@
      *
      * @param[in] functional - If the Functional property should
      *                         be set to true or false.
+     *
+     * @return - True if an exception was encountered during update
      */
-    void updateInventory(bool functional);
+    bool updateInventory(bool functional);
 
     /**
      * @brief Called by _monitorTimer to start fan monitoring some