diff --git a/session.c b/session.c
index f265fdc3e..34b049a0f 100644
--- a/session.c
+++ b/session.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: session.c,v 1.344 2025/09/25 02:15:39 jsg Exp $ */
+/* $OpenBSD: session.c,v 1.345 2025/11/17 12:59:29 jca Exp $ */
 /*
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
@@ -1012,6 +1012,12 @@ do_setup_env(struct ssh *ssh, Session *s, const char *shell)
 
 	if (getenv("TZ"))
 		child_set_env(&env, &envsize, "TZ", getenv("TZ"));
+#ifdef HAVE_LOGIN_CAP
+	if (getenv("XDG_RUNTIME_DIR")) {
+		child_set_env(&env, &envsize, "XDG_RUNTIME_DIR",
+		    getenv("XDG_RUNTIME_DIR"));
+	}
+#endif /* HAVE_LOGIN_CAP */
 	if (s->term)
 		child_set_env(&env, &envsize, "TERM", s->term);
 	if (s->display)