diff --git a/multi-client-ws-http-kit/src/clj/multi_client_ws_http_kit/routes/home.clj b/multi-client-ws-http-kit/src/clj/multi_client_ws_http_kit/routes/home.clj
index 6f29706..0ff9d8e 100644
--- a/multi-client-ws-http-kit/src/clj/multi_client_ws_http_kit/routes/home.clj
+++ b/multi-client-ws-http-kit/src/clj/multi_client_ws_http_kit/routes/home.clj
@@ -18,7 +18,7 @@
 
 (defn disconnect! [channel status]
   (log/info "channel closed:" status)
-  (swap! channels #(remove #{channel} %)))
+  (swap! channels disj channel))
 
 (defn ws-handler [request]
   (with-channel request channel