diff --git a/usr.sbin/syslogd/syslogd.c b/usr.sbin/syslogd/syslogd.c
--- a/usr.sbin/syslogd/syslogd.c
+++ b/usr.sbin/syslogd/syslogd.c
@@ -3010,6 +3010,7 @@
 			logerror("filter compile error");
 			exit(1);
 		}
+		free(pfilter_dup);
 	}
 
 	/* scan through the list of selectors */