1 files changed, 7 insertions, 0 deletions
diff --git a/lib/option.ml b/lib/option.ml
index c3fe9ce469..ef7a2e9e58 100644
--- a/lib/option.ml
+++ b/lib/option.ml
@@ -153,6 +153,13 @@ module List =
   let rec flatten = function
     | x::l -> cons x (flatten l)
     | [] -> []
+
+  let rec find f = function
+    |[] -> None
+    |h :: t -> match f h with
+	 |None -> find f t
+	 |x -> x
+
 end