diff --git a/redfish-core/lib/redfish_sessions.hpp b/redfish-core/lib/redfish_sessions.hpp
index 035a9a8..e4eae68 100644
--- a/redfish-core/lib/redfish_sessions.hpp
+++ b/redfish-core/lib/redfish_sessions.hpp
@@ -22,6 +22,7 @@
 #include <http/utility.hpp>
 #include <query.hpp>
 #include <registries/privilege_registry.hpp>
+#include <utils/json_utils.hpp>
 
 namespace redfish
 {