diff --git a/units/user@.service.m4.in b/units/user@.service.m4.in
index 1e21d51aaef..66aba4f9850 100644
--- a/units/user@.service.m4.in
+++ b/units/user@.service.m4.in
@@ -17,3 +17,4 @@ ExecStart=-@rootlibexecdir@/systemd --user
 Slice=user-%i.slice
 KillMode=mixed
 Delegate=yes
+TasksMax=infinity