diff --git a/monitor/main.cpp b/monitor/main.cpp
index fc19827..0949c77 100644
--- a/monitor/main.cpp
+++ b/monitor/main.cpp
@@ -71,9 +71,7 @@
 
 #ifdef MONITOR_USE_JSON
 
-    phosphor::fan::JsonConfig config(
-        bus, confAppName, confFileName,
-        std::bind(&System::start, &system, std::placeholders::_1));
+    phosphor::fan::JsonConfig config(std::bind(&System::start, &system));
 
     // Enable SIGHUP handling to reload JSON config
     stdplus::signal::block(SIGHUP);
diff --git a/monitor/system.cpp b/monitor/system.cpp
index a6af9bf..22279da 100644
--- a/monitor/system.cpp
+++ b/monitor/system.cpp
@@ -50,15 +50,13 @@
     _thermalAlert(bus, THERMAL_ALERT_OBJPATH)
 {}
 
-void System::start(
-#ifdef MONITOR_USE_JSON
-    const std::string& confFile
-#endif
-)
+void System::start()
 {
     _started = true;
     json jsonObj = json::object();
 #ifdef MONITOR_USE_JSON
+    auto confFile =
+        fan::JsonConfig::getConfFile(_bus, confAppName, confFileName);
     jsonObj = fan::JsonConfig::load(confFile);
 #endif
     // Retrieve and set trust groups within the trust manager
diff --git a/monitor/system.hpp b/monitor/system.hpp
index df03fe2..3b4c309 100644
--- a/monitor/system.hpp
+++ b/monitor/system.hpp
@@ -109,16 +109,9 @@
     }
 
     /**
-     * @brief Parses and populates the fan monitor
-     *        trust groups and list of fans
-     *
-     * @param[in] confFile - The config file path
+     * @brief Parses and populates the fan monitor trust groups and list of fans
      */
-    void start(
-#ifdef MONITOR_USE_JSON
-        const std::string& confFile
-#endif
-    );
+    void start();
 
   private:
     /* The mode of fan monitor */