diff --git a/jupyter-connection.el b/jupyter-connection.el
index dc9fb73..6980d14 100644
--- a/jupyter-connection.el
+++ b/jupyter-connection.el
@@ -67,9 +67,6 @@ connected to.")
 (cl-defmethod jupyter-stop ((io function) &optional _channel)
   (jupyter-send io 'stop))
 
-(defun jupyter-conn-id (conn)
-  (funcall (jupyter-connection-id conn)))
-
 ;;;; `jupyter-connection'
 
 (cl-defgeneric jupyter-connection (thing)
diff --git a/jupyter-kernel.el b/jupyter-kernel.el
index 18079af..f918ddb 100644
--- a/jupyter-kernel.el
+++ b/jupyter-kernel.el
@@ -49,6 +49,16 @@
   "Return non-nil if KERNEL has been launched."
   (and (jupyter-kernel-session kernel) t))
 
+(cl-defmethod cl-print-object ((kernel jupyter-kernel) stream)
+  (princ (format "#<jupyter-kernel %s%s>"
+                 (jupyter-kernelspec-name (jupyter-kernel-spec kernel))
+                 (if (jupyter-alive-p kernel)
+                     (concat " " (truncate-string-to-width
+                                  (jupyter-session-id (jupyter-kernel-session kernel))
+                                  9 nil nil "…"))
+                   ""))
+         stream))
+
 (cl-defgeneric jupyter-kernel (&rest args)
   "Return a kernel constructed from ARGS.
 ARGS are keyword arguments used to initialize the returned