diff --git a/src/vim9class.c b/src/vim9class.c
index 9c7badc..165c329 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -1475,6 +1475,7 @@
 
 	// Add the class to the script-local variables.
 	// TODO: handle other context, e.g. in a function
+	// TODO: does uf_hash need to be cleared?
 	typval_T tv;
 	tv.v_type = VAR_CLASS;
 	tv.vval.v_class = cl;