diff --git a/redfish-core/lib/cpudimm.hpp b/redfish-core/lib/cpudimm.hpp
index d8d4191..ce36a0b 100644
--- a/redfish-core/lib/cpudimm.hpp
+++ b/redfish-core/lib/cpudimm.hpp
@@ -71,8 +71,8 @@
 {
     BMCWEB_LOG_DEBUG << "Get CPU resources by interface.";
 
-    const bool *present = NULL;
-    const bool *functional = NULL;
+    const bool *present = nullptr;
+    const bool *functional = nullptr;
     for (const auto &interface : cpuInterfacesProperties)
     {
         for (const auto &property : interface.second)
diff --git a/redfish-core/lib/log_services.hpp b/redfish-core/lib/log_services.hpp
index 643be9b..2eb00b6 100644
--- a/redfish-core/lib/log_services.hpp
+++ b/redfish-core/lib/log_services.hpp
@@ -190,7 +190,7 @@
         static_cast<time_t>(timestamp / 1000 / 1000); // Convert from us to s
     struct tm *loctime = localtime(&t);
     char entryTime[64] = {};
-    if (NULL != loctime)
+    if (nullptr != loctime)
     {
         strftime(entryTime, sizeof(entryTime), "%FT%T%z", loctime);
     }