diff --git a/darwin/area.m b/darwin/area.m
index 6929f292..23162e6c 100644
--- a/darwin/area.m
+++ b/darwin/area.m
@@ -309,6 +309,7 @@ mouseEvent(otherMouseUp)
 		[self setNeedsDisplay:YES];
 }
 
+// TODO does this update the frame?
 - (void)setScrollingSize:(NSSize)s
 {
 	self->libui_ss = s;