diff --git a/src/simplnx/DataStructure/DataObject.hpp b/src/simplnx/DataStructure/DataObject.hpp
index 592a37c70d..c1405a3441 100644
--- a/src/simplnx/DataStructure/DataObject.hpp
+++ b/src/simplnx/DataStructure/DataObject.hpp
@@ -10,6 +10,7 @@
 #include <memory>
 #include <optional>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 namespace nx::core