diff --git a/modules/ILL/ILL/UTF8.moon b/modules/ILL/ILL/UTF8.moon
index 20a46ac..f39a0d4 100644
--- a/modules/ILL/ILL/UTF8.moon
+++ b/modules/ILL/ILL/UTF8.moon
@@ -20,7 +20,7 @@ class UTF8
                     charI += 1
                     return charI, s\sub currPos, sPos - 1
 
-    len: (s) ->
+    len: =>
         n = 0
         for ci in @chars!
             n += 1