diff --git a/src/gemini/client.lisp b/src/gemini/client.lisp
index 4dc672e..4236a5c 100644
--- a/src/gemini/client.lisp
+++ b/src/gemini/client.lisp
@@ -441,7 +441,7 @@
            (usocket:socket-connect hostname
                                    port
                                    :element-type '(unsigned-byte 8))))
-    #+sbcl (sb-sys:with-deadline (:seconds +open-socket-response-deadline+)
+    #+sbcl (sb-ext:with-timeout +open-socket-response-deadline+
              (open-socket (idn:host-unicode->ascii host)))
     #-sbcl (open-socket (idn:host-unicode->ascii host))))