diff --git a/service/postfix/run b/service/postfix/run
index d108d39..84fbe01 100755
--- a/service/postfix/run
+++ b/service/postfix/run
@@ -7,7 +7,7 @@ echo "${PWD##*/}: started."
 #   without this workaround it uses 127.0.0.1:53 for some unknown (yet) reason...
 [ -d /var/spool/postfix/etc ] || mkdir -v /var/spool/postfix/etc
 
-diff -q /var/spool/postfix/etc/resolv.conf /etc/resolv.conf
+diff -q /var/spool/postfix/etc/resolv.conf /etc/resolv.conf 2>/dev/null
 [ $? -eq 0 ] || cp -v /etc/resolv.conf /var/spool/postfix/etc/resolv.conf
 
 # run postfix consistency check and exit if failed