diff --git a/nixos/modules/services/web-servers/unit/default.nix b/nixos/modules/services/web-servers/unit/default.nix
index 989866144e1e..65dcdbed0003 100644
--- a/nixos/modules/services/web-servers/unit/default.nix
+++ b/nixos/modules/services/web-servers/unit/default.nix
@@ -102,7 +102,7 @@ in {
         PIDFile = "/run/unit/unit.pid";
         ExecStart = ''
           ${cfg.package}/bin/unitd --control 'unix:/run/unit/control.unit.sock' --pid '/run/unit/unit.pid' \
-                                   --log '${cfg.logDir}/unit.log' --state '${cfg.stateDir}' \
+                                   --log '${cfg.logDir}/unit.log' --state '${cfg.stateDir}' --tmp '/tmp' \
                                    --user ${cfg.user} --group ${cfg.group}
         '';
         ExecStop = ''