diff --git a/fault-monitor/operational-status-monitor.cpp b/fault-monitor/operational-status-monitor.cpp
index de6ee21..1114463 100644
--- a/fault-monitor/operational-status-monitor.cpp
+++ b/fault-monitor/operational-status-monitor.cpp
@@ -23,7 +23,7 @@
     // Get all the properties of
     // "xyz.openbmc_project.State.Decorator.OperationalStatus" interface
     std::string interfaceName{};
-    std::map<std::string, std::variant<bool>> properties;
+    std::unordered_map<std::string, std::variant<bool>> properties;
     msg.read(interfaceName, properties);
 
     const auto it = properties.find("Functional");