gistfile1.diff

diff --git a/src/dispcount_watcher.erl b/src/dispcount_watcher.erl
index 708cd20..c3bb67a 100644
--- a/src/dispcount_watcher.erl
+++ b/src/dispcount_watcher.erl
@@ -149,6 +149,8 @@ is_free(Tid, Id) ->
     %% which should cause no overhead but be fine to deal
     %% with short spikes.
     case ets:update_counter(Tid, Id, {2,1}) of
+        3 -> true;
+        2 -> true;
         1 -> true;
         _ -> false
     end.