diff --git a/src/PSUSensorMain.cpp b/src/PSUSensorMain.cpp
index f300430..fb4e0d5 100644
--- a/src/PSUSensorMain.cpp
+++ b/src/PSUSensorMain.cpp
@@ -1209,6 +1209,10 @@
             boost::container::flat_map<std::string, std::variant<bool>> values;
             message.read(objectName, values);
             auto findPresence = values.find("Present");
+            if (findPresence == values.end())
+            {
+                return;
+            }
             try
             {
                 cpuPresence[index] = std::get<bool>(findPresence->second);