diff --git a/unix/gtkapp.c b/unix/gtkapp.c
index c492d2b2..4afe8be5 100644
--- a/unix/gtkapp.c
+++ b/unix/gtkapp.c
@@ -156,6 +156,7 @@ void launch_duplicate_session(Conf *conf)
 {
     extern const int dup_check_launchable;
     assert(!dup_check_launchable || conf_launchable(conf));
+    g_application_hold(G_APPLICATION(app));
     new_session_window(conf_copy(conf), NULL);
 }