diff --git a/xpcPlugin/DataManager.cpp b/xpcPlugin/DataManager.cpp
index abdf5b8..fba2466 100644
--- a/xpcPlugin/DataManager.cpp
+++ b/xpcPlugin/DataManager.cpp
@@ -25,6 +25,7 @@
 
 namespace std
 {
+    // Note: This is required for unordered_map
 	template <>
 	struct hash<XPC::DREF>
 	{