diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -1229,6 +1229,10 @@
     void Reset();
 };
 
+/**
+ * DEPRECATED! Please use node.chainman instead. May only be used in
+ * validation.cpp internally
+ */
 extern ChainstateManager g_chainman GUARDED_BY(::cs_main);
 
 /** @returns the most-work valid chainstate. */