diff --git a/lib/localiser/localisation/tag/filter.ex b/lib/localiser/localisation/tag/filter.ex
index fc09a5a..6a22be5 100644
--- a/lib/localiser/localisation/tag/filter.ex
+++ b/lib/localiser/localisation/tag/filter.ex
@@ -37,7 +37,7 @@ defmodule Localiser.Localisation.Tag.Filter do
   def init(tag) do
     filter_module = Application.get_env(:localiserd, :default_filter, @default_filter)
     rooms = load_rooms()
-    {:ok, filter_state} = filter_module.init([], [])
+    {:ok, filter_state} = filter_module.init([], rooms: rooms)
 
     Phoenix.PubSub.subscribe(Localiser.PubSub, "rooms")