diff --git a/systemd/srsd.service b/systemd/srsd.service
index 7e2a263..8019b56 100644
--- a/systemd/srsd.service
+++ b/systemd/srsd.service
@@ -7,7 +7,7 @@
 Description=Sender Rewriting Scheme Daemon
 
 [Service]
-Type=exec
+Type=Simple
 User=Debian-exim
 Group=Debian-exim
 ExecStart=/usr/bin/srsd --secretfile /etc/exim4/srsd.secret --hashlength 24