diff --git a/nagios/templates/check_library.sh.j2 b/nagios/templates/check_library.sh.j2
index 3072b50c..63838b8b 100644
--- a/nagios/templates/check_library.sh.j2
+++ b/nagios/templates/check_library.sh.j2
@@ -1,4 +1,9 @@
 
+EXPORT NAGIOS_OK=0
+EXPORT NAGIOS_WARNING=1
+EXPORT NAGIOS_CRITICAL=2
+EXPORT NAGIOS_UNKNOWN=3
+
 ISTI_PLUGDIR={{ nagios_isti_plugdir }}
 COMMON_LIB={{ nagios_common_lib }}