diff --git a/HowtoCheckconf.md b/HowtoCheckconf.md
index e2c95234..35fade25 100644
--- a/HowtoCheckconf.md
+++ b/HowtoCheckconf.md
@@ -48,7 +48,7 @@ Syntax check complete.
 ## Postfix
 
 ~~~
-# 
+# postconf >/dev/null
 
 ~~~