diff --git a/puppet/modules/site_check_mk/files/extra_service_conf.mk b/puppet/modules/site_check_mk/files/extra_service_conf.mk
index c7120a96b902faf4bfebb378bab09cd165e59846..9212af95d7b9f978be4d3b0582dc4307630875b7 100644
--- a/puppet/modules/site_check_mk/files/extra_service_conf.mk
+++ b/puppet/modules/site_check_mk/files/extra_service_conf.mk
@@ -1,6 +1,9 @@
 # retry 3 times before setting a service into a hard state
-# and send out notification
+# Delay a hard state of the APT check for 1 day
+# so unattended_upgrades has time to upgrade packages.
+#
 extra_service_conf["max_check_attempts"] = [
+  ("360", ALL_HOSTS , ["APT"] ),
   ("4", ALL_HOSTS , ALL_SERVICES )
 ]
 
@@ -11,4 +14,3 @@ extra_service_conf["max_check_attempts"] = [
 extra_service_conf["normal_check_interval"] = [
   ("4", ALL_HOSTS , "Check_MK" )
 ]
-