diff --git a/conf.d/11-firewall.conf b/conf.d/11-firewall.conf
index e4c680de0f7a2a094431d70a2a81c293f7c3c4d5..9998bd49495d18b344d41e966f52da836f252632 100644
--- a/conf.d/11-firewall.conf
+++ b/conf.d/11-firewall.conf
@@ -1,9 +1,6 @@
 # 11-firewall.conf
 filter {
   if "pf" in [tags] and [syslog_program] =~ /^filterlog$/ {
-    mutate {
-      remove_field => [ "msg", "datetime" ]
-    }
     grok {
       add_tag => [ "firewall" ]
       patterns_dir => ["/etc/logstash/conf.d/patterns"]