diff --git a/cmd-respawn-pane.c b/cmd-respawn-pane.c
index 36f8783b..bcde2754 100644
--- a/cmd-respawn-pane.c
+++ b/cmd-respawn-pane.c
@@ -77,7 +77,7 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmd_q *cmdq)
 		cmd = args->argv[0];
 	else
 		cmd = NULL;
-	if (window_pane_spawn(wp, cmd, NULL, NULL, &env, s->tio, &cause) != 0) {
+	if (window_pane_spawn(wp, cmd, NULL, -1, &env, s->tio, &cause) != 0) {
 		cmdq_error(cmdq, "respawn pane failed: %s", cause);
 		free(cause);
 		environ_free(&env);
diff --git a/cmd-respawn-window.c b/cmd-respawn-window.c
index 6026ca64..e6d913cf 100644
--- a/cmd-respawn-window.c
+++ b/cmd-respawn-window.c
@@ -79,7 +79,7 @@ cmd_respawn_window_exec(struct cmd *self, struct cmd_q *cmdq)
 		cmd = args->argv[0];
 	else
 		cmd = NULL;
-	if (window_pane_spawn(wp, cmd, NULL, NULL, &env, s->tio, &cause) != 0) {
+	if (window_pane_spawn(wp, cmd, NULL, -1, &env, s->tio, &cause) != 0) {
 		cmdq_error(cmdq, "respawn window failed: %s", cause);
 		free(cause);
 		environ_free(&env);