diff --git a/gnu/services/xorg.scm b/gnu/services/xorg.scm
index 8f285b29a3..cef0d60b59 100644
--- a/gnu/services/xorg.scm
+++ b/gnu/services/xorg.scm
@@ -390,7 +390,8 @@ (define (find-session profile)
                                  x))))
           (if (file-exists? xsession-file)
               ;; Run ~/.xsession when it exists.
-              (apply exec-from-login-shell xsession-file session)
+              (apply exec-from-login-shell xsession-file
+                     (or session '()))
               ;; Otherwise, start the specified session or a fallback.
               (apply exec-from-login-shell
                      (or session