diff --git a/argument.cpp b/argument.cpp
index ba4ebbc..5733e09 100644
--- a/argument.cpp
+++ b/argument.cpp
@@ -22,7 +22,7 @@
     CLI11_PARSE(app, argc, argv);
     phosphor::certs::CertificateType type =
         phosphor::certs::stringToCertificateType(arguments.typeStr);
-    if (type == phosphor::certs::CertificateType::Unsupported)
+    if (type == phosphor::certs::CertificateType::unsupported)
     {
         std::cerr << "type not specified or invalid." << std::endl;
         return 1;