diff --git a/debian/domcheck.check.cron.d b/debian/domcheck.check.cron.d
index 7b12fbb..b3661c9 100644
--- a/debian/domcheck.check.cron.d
+++ b/debian/domcheck.check.cron.d
@@ -1 +1,2 @@
+CONTENT_TYPE="text/plain; charset=utf-8"
 * * * * * root /usr/sbin/check 2>&1 | /usr/bin/messagerate