diff --git a/presence/json_parser.cpp b/presence/json_parser.cpp
index c4ff3b8..4c4a55c 100644
--- a/presence/json_parser.cpp
+++ b/presence/json_parser.cpp
@@ -50,9 +50,11 @@
 JsonConfig::JsonConfig(sdbusplus::bus::bus& bus) : _bus(bus)
 {}
 
-void JsonConfig::start(const std::string& confFile)
+void JsonConfig::start()
 {
-    process(phosphor::fan::JsonConfig::load(confFile));
+    using config = fan::JsonConfig;
+
+    process(config::load(config::getConfFile(_bus, confAppName, confFileName)));
 
     for (auto& p : _policies)
     {
diff --git a/presence/json_parser.hpp b/presence/json_parser.hpp
index 857a2f8..fc60229 100644
--- a/presence/json_parser.hpp
+++ b/presence/json_parser.hpp
@@ -78,10 +78,8 @@
      * @brief Parses and populates the fan presence policies from
      *        the json file and then starts the actual presence
      *        detecting.
-     *
-     * @param[in] confFile - The conf file name to use
      */
-    void start(const std::string& confFile);
+    void start();
 
   private:
     /* Fan presence policies */
diff --git a/presence/tach_detect.cpp b/presence/tach_detect.cpp
index 3527105..5c1fbc9 100644
--- a/presence/tach_detect.cpp
+++ b/presence/tach_detect.cpp
@@ -41,9 +41,7 @@
     // jsonConfig will call config::start when
     // the conf file is available.
     phosphor::fan::JsonConfig jsonConfig{
-        bus, presence::confAppName, presence::confFileName,
-        std::bind(&presence::JsonConfig::start, &config,
-                  std::placeholders::_1)};
+        std::bind(&presence::JsonConfig::start, &config)};
 
     stdplus::signal::block(SIGHUP);
     sdeventplus::source::Signal signal(