diff --git a/guix/scripts/copy.scm b/guix/scripts/copy.scm
index 45f7cbbad5..32438b99d9 100644
--- a/guix/scripts/copy.scm
+++ b/guix/scripts/copy.scm
@@ -75,7 +75,8 @@ (define (send-to-remote-host target opts)
 
       (and (or (assoc-ref opts 'dry-run?)
                (build-derivations local drv))
-           (let* ((session (open-ssh-session host #:user user #:port port))
+           (let* ((session (open-ssh-session host #:user user
+                                             #:port (or port 22)))
                   (sent    (send-files local items
                                        (connect-to-remote-daemon session)
                                        #:recursive? #t)))
@@ -88,7 +89,7 @@ (define (retrieve-from-remote-host source opts)
     (let*-values (((user host port)
                    (ssh-spec->user+host+port source))
                   ((session)
-                   (open-ssh-session host #:user user #:port port))
+                   (open-ssh-session host #:user user #:port (or port 22)))
                   ((remote)
                    (connect-to-remote-daemon session)))
       (set-build-options-from-command-line local opts)