diff --git a/stunnel/tools/stunnel.service.in b/stunnel/tools/stunnel.service.in
index 64ba7fa..620a0e7 100644
--- a/stunnel/tools/stunnel.service.in
+++ b/stunnel/tools/stunnel.service.in
@@ -5,6 +5,7 @@ After=syslog.target network.target
 [Service]
 ExecStart=@bindir@/stunnel
 Type=forking
+PrivateTmp=true
 
 [Install]
 WantedBy=multi-user.target