diff -up stunnel-5.61/tools/stunnel.service.in.systemd-service stunnel-5.61/tools/stunnel.service.in
--- stunnel-5.61/tools/stunnel.service.in.systemd-service	2022-01-10 19:16:30.973923459 +0100
+++ stunnel-5.61/tools/stunnel.service.in	2022-01-10 19:17:08.588605718 +0100
@@ -6,6 +6,7 @@ After=syslog.target network-online.targe
 ExecStart=@bindir@/stunnel
 ExecReload=/bin/kill -HUP $MAINPID
 Type=forking
+PrivateTmp=true
 
 [Install]
 WantedBy=multi-user.target