diff --git a/README.md b/README.md
index e1955e2..a923601 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ To use with `postfix`:
 
     In case you are using systemd:
     ```
-    # systemctl restart postfix.services
+    # systemctl restart postfix.service
     ```
 
 - Send a mail and check the logfile.