diff --git a/modules/system/boot/systemd.nix b/modules/system/boot/systemd.nix
index b4104980618..40ff14dda7a 100644
--- a/modules/system/boot/systemd.nix
+++ b/modules/system/boot/systemd.nix
@@ -157,6 +157,7 @@ let
       # Journal.
       "systemd-journald.socket"
       "systemd-journald.service"
+      "systemd-journal-flush.service"
       "syslog.socket"
 
       # SysV init compatibility.