diff --git a/ocaml/evaluate.ml b/ocaml/evaluate.ml
index e4e8046..c561401 100644
--- a/ocaml/evaluate.ml
+++ b/ocaml/evaluate.ml
@@ -2,7 +2,7 @@ open Str
 
 
 let is_url url =
-  let regexp = regexp "\\(https?\\://\\)?www\\..+\\..+" in
+  let regexp = regexp "\\(https?\\://\\)?\\(www\\.\\)?.+\\..+" in
   string_match regexp url 0