diff --git a/lib/Properties.hs b/lib/Properties.hs
index d78cb8c67ccb4a5e8b06de7278874d9586bea307..4b516243990765f23c7d2a853e72127ec5132f39 100644
--- a/lib/Properties.hs
+++ b/lib/Properties.hs
@@ -368,16 +368,12 @@ checkTileLayerProperty p@(Property name _value) = case name of
         Just ("bbb",assembly_slug, room_slug)
           | "/" `isPrefixOf` room_slug
             && T.length room_slug >= 2  -> do
-          assemblies <- lintConfig configAssemblies
-          if assembly_slug `elem` assemblies
-            then do
-              let link = "https://rc3.world/2021/room/"<>room_slug
+              let link = "https://rc3.world/2021/room"<>room_slug
               dependsOn (Link link)
               setProperty "openWebsite" link
               setProperty "silent" (BoolProp True)
               setProperty "openWebsitePolicy"
                 ("fullscreen;camera;microphone;display-capture" :: Text)
-            else complain $ prettyprint assembly_slug <> " is not a registered assembly and therefore cannot be used in `bbbUrl`."
         _ -> complain "the \"bbbRoom\" property must take a link of the form bbb://assembly_slug/room_slug."
     "bbbTrigger" -> do
       removeProperty "bbbTrigger"