diff --git a/bmc_epoch.cpp b/bmc_epoch.cpp
index 5889ed3..92f31d8 100644
--- a/bmc_epoch.cpp
+++ b/bmc_epoch.cpp
@@ -27,7 +27,7 @@
 using namespace phosphor::logging;
 
 BmcEpoch::BmcEpoch(sdbusplus::bus::bus& bus, const char* objPath) :
-    EpochBase(bus, objPath), bus(bus)
+    EpochBase(bus, objPath)
 {
     initialize();
 }
diff --git a/bmc_epoch.hpp b/bmc_epoch.hpp
index 21cf540..b47a39b 100644
--- a/bmc_epoch.hpp
+++ b/bmc_epoch.hpp
@@ -55,9 +55,6 @@
     static int onTimeChange(sd_event_source* es, int fd, uint32_t revents,
                             void* userdata);
 
-    /** @brief The reference of sdbusplus bus */
-    sdbusplus::bus::bus& bus;
-
     /** @brief The deleter of sd_event_source */
     std::function<void(sd_event_source*)> sdEventSourceDeleter =
         [](sd_event_source* p) {
diff --git a/main.cpp b/main.cpp
index 2f40341..1927f4e 100644
--- a/main.cpp
+++ b/main.cpp
@@ -10,7 +10,7 @@
     auto bus = sdbusplus::bus::new_default();
     sd_event* event = nullptr;
 
-    auto eventDeleter = [](sd_event* e) { e = sd_event_unref(e); };
+    auto eventDeleter = [](sd_event* e) { sd_event_unref(e); };
     using SdEvent = std::unique_ptr<sd_event, decltype(eventDeleter)>;
 
     // acquire a reference to the default event loop
diff --git a/utils.cpp b/utils.cpp
index be29c74..95edd99 100644
--- a/utils.cpp
+++ b/utils.cpp
@@ -34,10 +34,7 @@
             lg2::error("Error reading mapper response");
             throw std::runtime_error("Error reading mapper response");
         }
-        if (mapperResponse.size() < 1)
-        {
-            return "";
-        }
+
         return mapperResponse[0].first;
     }
     catch (const sdbusplus::exception::exception& ex)