diff --git a/checks/check_hddtemp.sh b/checks/check_hddtemp.sh
index c87a6f9..2bca556 100755
--- a/checks/check_hddtemp.sh
+++ b/checks/check_hddtemp.sh
@@ -12,13 +12,14 @@
 #	- options in linux style
 #	- it should do its job perfectly
 #
+# The warning and critical values are from a 2007 Google study (Failure Trends in a Large Disk Drive Population)
 #
 ################################################################################
 
 HDDTEMP="/usr/sbin/hddtemp"
 PARAMETER="$*"
 WARNING="40"
-CRITICAL="50"
+CRITICAL="45"
 
 function hilfetext(){
 	cat <<- EOF