diff --git a/redfish-core/include/task_messages.hpp b/redfish-core/include/task_messages.hpp
index 33c2db5..cbf4f00 100644
--- a/redfish-core/include/task_messages.hpp
+++ b/redfish-core/include/task_messages.hpp
@@ -83,7 +83,7 @@
         {"MessageId", "TaskEvent.1.0.1.TaskProgressChanged"},
         {"Message", "The task with id " + arg1 + " has changed to progress " +
                         std::to_string(arg2) + " percent complete."},
-        {"MessageArgs", {arg1, arg2}},
+        {"MessageArgs", {arg1, std::to_string(arg2)}},
         {"Severity", "OK"},
         {"Resolution", "None."}};
 }