diff --git a/data/xdg-desktop-portal-gtk.service.in b/data/xdg-desktop-portal-gtk.service.in
index b82a039..1e60a3f 100644
--- a/data/xdg-desktop-portal-gtk.service.in
+++ b/data/xdg-desktop-portal-gtk.service.in
@@ -1,5 +1,6 @@
 [Unit]
 Description=Portal service (GTK/GNOME implementation)
+After=graphical-session.target
 
 [Service]
 Type=dbus