Update #tree.evaluated for V=0 too.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ht.erl b/src/ht.erl
index 462dfa2..9aa989f 100644
--- a/src/ht.erl
+++ b/src/ht.erl
@@ -278,7 +278,7 @@ update(Tree) ->
 -spec update(tree(), non_neg_integer()) -> tree().
 update(Tree, 0) ->
     %% A version 0 tree needs no updating.
-    Tree;
+    Tree#tree{evaluated = 0};
 update(Tree = #tree{evaluated = E}, V) when E >= V ->
     %% Evaluated enough already. Nothing to do.
     Tree;