diff --git a/extensions/openpower-pels/dbus_types.hpp b/extensions/openpower-pels/dbus_types.hpp
index 047ef77..0b388e3 100644
--- a/extensions/openpower-pels/dbus_types.hpp
+++ b/extensions/openpower-pels/dbus_types.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstdint>
 #include <map>
 #include <string>
 #include <variant>
diff --git a/extensions/openpower-pels/json_utils.hpp b/extensions/openpower-pels/json_utils.hpp
index 4ee32f4..2065952 100644
--- a/extensions/openpower-pels/json_utils.hpp
+++ b/extensions/openpower-pels/json_utils.hpp
@@ -3,6 +3,7 @@
 #include <ctype.h>
 #include <stdio.h>
 
+#include <cstdint>
 #include <fstream>
 #include <iomanip>
 #include <iostream>
diff --git a/extensions/openpower-pels/pel_values.hpp b/extensions/openpower-pels/pel_values.hpp
index d737267..16556f3 100644
--- a/extensions/openpower-pels/pel_values.hpp
+++ b/extensions/openpower-pels/pel_values.hpp
@@ -2,6 +2,7 @@
 
 #include "pel_types.hpp"
 
+#include <cstdint>
 #include <map>
 #include <string>
 #include <tuple>
diff --git a/extensions/openpower-pels/registry.cpp b/extensions/openpower-pels/registry.cpp
index e646928..aeba998 100644
--- a/extensions/openpower-pels/registry.cpp
+++ b/extensions/openpower-pels/registry.cpp
@@ -659,10 +659,11 @@
     const auto& registry = reg.value();
     // Find an entry with this name in the PEL array.
     auto e = std::find_if(registry["PELs"].begin(), registry["PELs"].end(),
-                          [&name, &type](const auto& j) {
-        return (
-            (name == j["Name"] && type == LookupType::name) ||
-            (name == j["SRC"]["ReasonCode"] && type == LookupType::reasonCode));
+                          [&name, &type](const nlohmann::json& j) {
+        return ((name == j.at("Name").get<std::string>() &&
+                 type == LookupType::name) ||
+                (name == j.at("SRC").at("ReasonCode").get<std::string>() &&
+                 type == LookupType::reasonCode));
     });
 
     if (e != registry["PELs"].end())
diff --git a/extensions/openpower-pels/user_data_json.hpp b/extensions/openpower-pels/user_data_json.hpp
index 9d6b79d..930e378 100644
--- a/extensions/openpower-pels/user_data_json.hpp
+++ b/extensions/openpower-pels/user_data_json.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstdint>
 #include <optional>
 #include <string>
 #include <vector>