diff --git a/darwin/menu.m b/darwin/menu.m
index 3cd07736..a3260178 100644
--- a/darwin/menu.m
+++ b/darwin/menu.m
@@ -33,6 +33,7 @@ enum {
 {
 	self = [super init];
 	if (self) {
+		// TODO NSPointerFunctionsOpaquePersonality?
 		self->items = [NSMapTable mapTableWithKeyOptions:NSPointerFunctionsOpaqueMemory
 			valueOptions:NSPointerFunctionsOpaqueMemory];
 		self->hasQuit = NO;