diff --git a/portal/flatpak-portal.service.in b/portal/flatpak-portal.service.in
index a19431fa..b7a35a88 100644
--- a/portal/flatpak-portal.service.in
+++ b/portal/flatpak-portal.service.in
@@ -1,5 +1,6 @@
 [Unit]
 Description=flatpak portal
+PartOf=graphical-session.target
 
 [Service]
 BusName=org.freedesktop.portal.Flatpak
diff --git a/session-helper/flatpak-session-helper.service.in b/session-helper/flatpak-session-helper.service.in
index e14cc27d..4da0dd9c 100644
--- a/session-helper/flatpak-session-helper.service.in
+++ b/session-helper/flatpak-session-helper.service.in
@@ -1,5 +1,6 @@
 [Unit]
 Description=flatpak session helper
+PartOf=graphical-session.target
 
 [Service]
 BusName=org.freedesktop.Flatpak