diff --git a/render.rkt b/render.rkt
index 6497583..4e34745 100644
--- a/render.rkt
+++ b/render.rkt
@@ -88,7 +88,7 @@
   (define render-needed? 
     (or force 
         (not (file-exists? (or output-path (->output-path source-path))))
-        (mod-date-expired? source-path)
+        (mod-date-expired? source-path) ; todo: markup takes template path as key
         (source-needs-rerequire? source-path)))
   
   (if render-needed?