diff --git a/plugins/postfix/postfix_stats b/plugins/postfix/postfix_stats
index 251d539d..44b737d4 100755
--- a/plugins/postfix/postfix_stats
+++ b/plugins/postfix/postfix_stats
@@ -62,7 +62,7 @@ GPLv2
 #set -xv
 MAIL_LOG="${logfiles:-/var/log/mail.log /var/log/mail.log.1}"
 
-GREP_HOSTNAME="${0##*postfix_stats_}"
+GREP_HOSTNAME=$(echo $0 | sed -r 's/^.+postfix_stats_?//')
 
 # shellcheck disable=SC2154
 PFLOGSUMM="${pflogsum}"