diff --git a/README b/README
index 68f5b75..cc490a6 100644
--- a/README
+++ b/README
@@ -1,13 +1,13 @@
 check_temp
 
 A small Nagios plugin that checks the CPU (or M/B) temperature with lm-sensors.
-It's written in Bash and uses some sed & awk.
-Default is to check the CPU temperature but this can be changed to for example 
+It's written in Bash and uses *nix "sensors" and some sed & awk.
+Default is to check the CPU temperature but this can be changed to, for example, 
 the motherboard temperature with a "--sensor" argument. 
 The plugin complies with the guidelines, for example uses -w -c -v arguments 
 etc. It also does some basic sanity checks and has a exit 3 catchall.
 
-The plugin were submitted to Nagios Exchange in 2011.
+The plugin was submitted to Nagios Exchange in 2011.
 
 Known forks of check_temp:
 There is a very good Perl fork of check_temp written by Chad Columbus. It's
diff --git a/THANKS b/THANKS
index 10a22d0..413af22 100644
--- a/THANKS
+++ b/THANKS
@@ -1,7 +1,7 @@
 check_temp THANKS file
 
 check_temp was originally written by Jack-Benny Persson.
-Some kind people has been contributing by reporting problems, suggesting
+Some kind people have been contributing by reporting problems, suggesting
 improvements or submitting code.
 Here is a list of these kind people.
 
diff --git a/check_temp.sh b/check_temp.sh
index 5634793..0a6dce6 100755
--- a/check_temp.sh
+++ b/check_temp.sh
@@ -215,21 +215,24 @@ ${SENSORPROG} | grep "Temp"
 printf "\n\n"
 fi
 
+# Get performance data for Nagios "Performance Data" field
+PERFDATA=`${SENSORPROG} | grep "$sensor"`
+
 
 # And finally check the temperature against our thresholds
 if [[ "$TEMP" -gt "$thresh_crit" ]]; then
 	# Temperature is above critical threshold
-	echo "$sensor CRITICAL - Temperature is $TEMP"
+	echo "$sensor CRITICAL - Temperature is $TEMP | $PERFDATA"
 	exit $STATE_CRITICAL
 
   elif [[ "$TEMP" -gt "$thresh_warn" ]]; then
 	# Temperature is above warning threshold
-	echo "$sensor WARNING - Temperature is $TEMP"
+	echo "$sensor WARNING - Temperature is $TEMP | $PERFDATA"
 	exit $STATE_WARNING
 
   else
 	# Temperature is ok
-	echo "$sensor OK - Temperature is $TEMP"
+	echo "$sensor OK - Temperature is $TEMP | $PERFDATA"
 	exit $STATE_OK
 fi
 exit 3