diff --git a/units/user-runtime-dir@.service.in b/units/user-runtime-dir@.service.in
index a187bb2839..434413525e 100644
--- a/units/user-runtime-dir@.service.in
+++ b/units/user-runtime-dir@.service.in
@@ -18,3 +18,4 @@ ExecStart=@rootlibexecdir@/systemd-user-runtime-dir start %i
 ExecStop=@rootlibexecdir@/systemd-user-runtime-dir stop %i
 Type=oneshot
 RemainAfterExit=true
+Slice=user-%i.slice